important question for zoology of ctevt 1st year

 1 Define zoology 

Zoology is the scientific study of animals, including their behavior, anatomy, physiology, and classification

2 Define cytology .

            Cytology is the branch of biology that deals with the structure, function, and composition of cells, including their organelles and interactions with other cells.

3 Who is father of taxonomy 

        Carl Linnaeus, a Swedish botanist, is often referred to as the father of taxonomy

4.  Connective tissue performs several functions in the body, including:

      Providing structural support: Connective tissue forms the structural framework of organs and tissues, giving them shape and strength.

        Connecting and binding tissues: Connective tissue connects and binds various tissues and organs in the body, allowing them to work together to perform their functions. For example, tendons connect muscles to bones, while ligaments connect bones to other bones.

5  write any two function of blood 

Blood performs several functions in the body, including:

Transporting nutrients and oxygen: Blood carries oxygen from the lungs to the cells of the body, and it transports nutrients from the digestive system to the cells that need them.

Removing waste products: Blood removes carbon dioxide and other waste products from the cells and carries them to the lungs and kidneys for elimination from the body.

6. write the full form of ICZN 

ICZN stands for the International Code on Zoological Nomenclature.

7  write any two function of neuroglia

Neuroglia, also known as glial cells, perform several functions in the nervous system, including:

Supporting and protecting neurons: Neuroglia provide structural support and protection to neurons, ensuring their proper functioning. They also form a barrier between the blood vessels and neurons, preventing harmful substances from reaching them.

Providing nutrients: Neuroglia are responsible for providing nutrients and oxygen to neurons, as well as removing waste products that can interfere with neuronal activity.

8. Define Species 

Species can be defined as a group of organisms that share common characteristics and are capable of interbreeding to produce fertile offspring.

9. write the dental formula of adults 

The dental formula for adult humans is:

2.1.2.3 / 2.1.2.3

This means that in each half of the upper and lower jaw, there are two incisors, one canine, two premolars, and three molars on each side. Therefore, in total, an adult human has 32 teeth. The dental formula can be written as follows:

I 2/2, C 1/1, P 2/2, M 3/3

9. The scientific name for tapeworms is Taenia solium (if referring to the pork tapeworm) and the scientific name for pigeons is Columba livia.

10. Nutrition can be defined as the process of obtaining and using food by living organisms to provide energy, promote growth and development, repair and maintain body tissues, and support overall health and well-being. It involves the ingestion, digestion, absorption, and utilization of nutrients such as carbohydrates, proteins, fats, vitamins, and minerals to support metabolic processes and sustain life.

11.  Define helminthology 

Helminthology is the branch of biology that deals with the study of helminths, which are parasitic worms that infect humans, animals, and plants. Helminthology involves the study of the morphology, anatomy, life cycle, ecology, and control of these organisms. Helminths include various groups of worms such as tapeworms, roundworms, flukes, and others, and they can cause significant diseases in their hosts.

12.  who is the father of zoology 

Aristotle, the ancient Greek philosopher, is often referred to as the "father of zoology." He was one of the first to systematically study animals and classify them based on their physical characteristics. His work laid the foundation for much of the biological classification and scientific inquiry that followed.

13.  structure and function of skeletal muscles 

Skeletal muscles are the muscles that are attached to bones and are responsible for movement of the body. They are composed of muscle fibers, connective tissue, blood vessels, and nerves.

Structure:

Each skeletal muscle is composed of bundles of muscle fibers, which are made up of myofibrils that contain contractile proteins called actin and myosin. These myofibrils are organized into repeating units called sarcomeres, which give the muscle its striated appearance. The muscle fibers are surrounded by connective tissue called endomysium, which also contains blood vessels and nerves. Bundles of muscle fibers are grouped together into fascicles, which are surrounded by another layer of connective tissue called perimysium. Multiple fascicles make up the entire muscle, which is surrounded by a layer of connective tissue called epimysium.

Function:

The main function of skeletal muscles is to generate force to produce movement of the body. When the muscle fibers contract, the actin and myosin filaments slide past each other, causing the sarcomeres to shorten and the muscle to contract. This contraction generates force that is transmitted through tendons to the bones, causing movement of the body. Skeletal muscles also help to maintain posture and stability of the body, and they play a role in regulating body temperature. Additionally, they can store and release energy through the breakdown of glycogen, a carbohydrate stored in muscle tissue.

14.  different between bone and cartilage 

15. scope of zoology

Zoology is a vast field of study that focuses on the biology of animals. Here are some points that describe the scope of Zoology:

Diversity of Animals: Zoology deals with the study of a wide range of animals, including insects, mammals, birds, fishes, and reptiles.

Animal Anatomy and Physiology: Zoology involves the study of animal structure, function, and behavior. This includes the study of organs, tissues, and cells of animals and how they function in various environmental conditions.

Evolutionary Biology: Zoology is also concerned with understanding the evolution of animals, including their origins, relationships, and adaptations.

Animal Behavior: Zoologists study the behavior of animals, including their social interactions, communication, mating patterns, and foraging habits.

Ecology and Conservation: Zoology also deals with the study of animal populations, their interactions with each other and their environment, and how they can be conserved.

Biomedical Research: Zoology has applications in biomedical research, including the study of animal models of disease and the development of treatments and vaccines.

Agriculture and Aquaculture: Zoology has a role in agriculture and aquaculture by helping to improve animal breeding and management, control pests and diseases, and maintain healthy ecosystems.

Education and Outreach: Zoology plays a role in educating the public about animal biology and conservation issues, and inspiring future generations of scientists.

Overall, zoology has a broad scope that includes many different areas of study and applications, all centered around the biology of animals.

17 Structure of Skeletal Muscle

Skeletal muscle is composed of long, cylindrical cells called muscle fibers. The muscle fiber is surrounded by a plasma membrane called the sarcolemma, and the cytoplasm of the muscle fiber is called the sarcoplasm. Myofibrils are the contractile elements of the muscle, and they are composed of sarcomeres, which are the contractile units of the muscle. Sarcomeres are composed of thin actin filaments and thick myosin filaments, and they are responsible for muscle contraction. T-tubules and the sarcoplasmic reticulum play important roles in muscle contraction by allowing electrical impulses to penetrate deep into the muscle fiber and releasing calcium ions that are necessary for contraction. Finally, motor neurons control the contraction of skeletal muscles by connecting to multiple muscle fibers.

18.    Kingdom Protista 

Kingdom Protista is a diverse group of eukaryotic organisms that exhibit a wide range of morphological, physiological, and ecological characteristics. Here are some of the general characteristics of Kingdom Protista:

Unicellular or Multicellular: Protists can be unicellular or multicellular, with unicellular forms being the most common.

Eukaryotic: Protists are eukaryotic, meaning that they have a true nucleus and other membrane-bound organelles.

Aquatic: Most protists are aquatic, and they can be found in both freshwater and marine environments.

Photosynthetic or Heterotrophic: Protists can be photosynthetic, like algae, or heterotrophic, like protozoans, depending on their nutritional requirements.

Sexual or Asexual Reproduction: Protists can reproduce sexually or asexually, depending on the species.

Flagella or Cilia: Many protists are motile and use flagella or cilia for locomotion.

Ecological Roles: Protists play important roles in aquatic ecosystems as primary producers, consumers, and decomposers.

Disease-Causing: Some protists are pathogens and can cause diseases in humans and other animals, such as malaria and giardiasis.

Overall, Kingdom Protista is a diverse group of eukaryotic organisms with a wide range of morphological, physiological, and ecological characteristics

19.  human alimentary canal 

The human alimentary canal, also known as the digestive tract or gastrointestinal (GI) tract, is a long, muscular tube that extends from the mouth to the anus. It is approximately 30 feet (9 meters) long and is responsible for breaking down food, absorbing nutrients, and eliminating waste from the body.

The alimentary canal is made up of several organs, including:

Mouth: The opening at the beginning of the alimentary canal where food enters the body.

Esophagus: A muscular tube that connects the mouth to the stomach and transports food down to the stomach using a series of muscular contractions called peristalsis.

Stomach: A muscular sac that mixes and grinds food with gastric juices to begin the process of digestion.

Small intestine: A long, narrow tube where most of the nutrients from food are absorbed into the bloodstream.

Large intestine: A wider tube that absorbs water and electrolytes from digested food, and forms solid waste (feces) for elimination from the body.

Rectum: The final section of the large intestine where feces are stored before elimination.

Anus: The opening at the end of the alimentary canal where feces are eliminated from the body.

The alimentary canal also includes several accessory organs that aid in the digestive process, such as the salivary glands, liver, pancreas, and gallbladder.

20. structure and function of neuron 

A neuron is a specialized cell in the nervous system that is responsible for transmitting information between different parts of the body. It consists of three main parts:

Cell body (soma): The main part of the neuron that contains the nucleus and other organelles needed for the normal functioning of the cell.

Dendrites: Branch-like structures that extend from the cell body and receive signals (in the form of chemical or electrical impulses) from other neurons or sensory receptors.

Axon: A long, slender projection that extends from the cell body and transmits electrical impulses (also known as action potentials) away from the cell body to other neurons or muscles 

Here are some key functions of neurons:

Communication: Neurons are specialized cells that transmit information throughout the body in the form of electrical and chemical signals.

Integration: Neurons receive and integrate signals from other neurons and sensory receptors to determine an appropriate response.

Plasticity: Neurons have the ability to change and adapt their structure and function in response to changes in the environment or experience.

Information processing: Neurons can perform complex computations and transformations on incoming signals, allowing the brain to process and interpret sensory information and generate appropriate responses.

Control of bodily functions: Neurons in the autonomic nervous system help to regulate various bodily functions such as heart rate, breathing, and digestion.

21. Simple Epithelial Tissue:, Types  location , function 

Simple Epithelial Tissue:

Simple epithelial tissue is a type of tissue that consists of a single layer of cells, with each cell in direct contact with the basement membrane. There are three main types of simple epithelial tissue: squamous, cuboidal, and columnar.

Squamous Epithelium:

Location: Lining of blood vessels, alveoli of lungs, and body cavities.

Function: Diffusion, filtration, and secretion.

Cuboidal Epithelium:

Location: Glands, kidney tubules, and thyroid gland follicles.

Function: Secretion and absorption.

Columnar Epithelium:

Location: Intestines, stomach lining, and respiratory tract.

Function: Absorption, secretion, and protection.

Simple epithelial tissue plays a vital role in the body by providing a barrier between different parts of the body and the external environment, as well as regulating the exchange of substances such as nutrients, gases, and waste products. It also helps to protect against physical and chemical damage and provides a surface for absorption and secretion.

22. Types of muscular tissue  types  function and location 

Types of Muscular Tissue:

There are three main types of muscular tissue in the human body: skeletal, smooth, and cardiac. Each type of muscular tissue has a unique structure, function, and location.

Skeletal Muscle:

Location: Attached to bones throughout the body.

Function: Movement, stability, and posture.

Smooth Muscle:

Location: Walls of internal organs, such as the stomach and intestines.

Function: Movement and contraction of internal organs.

Cardiac Muscle:

Location: Heart.

Function: Contraction of the heart to pump blood throughout the body.

Muscular tissue plays a vital role in the body by generating force and movement. Skeletal muscle is responsible for movement and posture, while smooth muscle helps to move substances through the digestive, respiratory, and urinary systems. Cardiac muscle helps to pump blood throughout the body. Each type of muscular tissue has a unique structure that is suited to its specific function.

23. rules of iczn 

The International Code of Zoological Nomenclature (ICZN) is a set of rules and guidelines that govern the scientific naming of animals. The main purpose of the ICZN is to promote stability and universality in the naming of animals, to avoid confusion and to facilitate communication among scientists. Here are some of the key rules of the ICZN:

The International Code of Zoological Nomenclature (ICZN) governs the scientific naming of animals.

Key rules include the Principle of Priority, Principle of Homonymy, Principle of Binominal Nomenclature, Principle of Synonymy, Principle of Typification, and Principle of Priority of Publication.

The rules aim to promote stability and universality in naming, avoid confusion, and facilitate communication among scientists.

The rules are constantly updated and revised by the International Commission on Zoological Nomenclature.

These rules, along with others, provide a framework for the consistent and systematic naming of animals in zoology. They are constantly updated and revised by the International Commission on Zoological Nomenclature to ensure their relevance and applicability to current scientific practice.

24.Connective Tissue:  types  function and location 

Connective Tissue:

Connective tissue is a type of tissue that supports, connects, or separates different types of tissues and organs in the body. It consists of cells and extracellular matrix, which contains fibers and ground substance. There are several types of connective tissue in the human body, each with a unique structure, function, and location.

Loose Connective Tissue:

Location: Beneath the skin, around blood vessels and nerves, and in organs.

Function: Provides support and elasticity.

Dense Connective Tissue:

Location: Tendons, ligaments, and dermis of the skin.

Function: Provides strength and support.

Adipose Tissue:

Location: Beneath the skin and around organs.

Function: Stores energy and provides insulation.

Cartilage:

Location: Joints, nose, ears, and respiratory tract.

Function: Provides support and flexibility.

Bone:

Location: Skeleton.

Function: Provides support, protection, and storage of minerals.

Blood:

Location: Circulatory system.

Function: Transports oxygen, nutrients, and waste products.

Connective tissue plays a vital role in the body by providing support, protection, and elasticity to different tissues and organs. It also helps to transport substances such as nutrients, waste products, and oxygen. Each type of connective tissue has a unique structure that is suited to its specific function.

To find the derivative of cos(2x) using first principles

 To find the derivative of cos(2x) using first principles, we start with the definition of the derivative:

f'(x) = lim h→0 [f(x+h) - f(x)] / h

In this case, f(x) = cos(2x), so we have:

f'(x) = lim h→0 [cos(2(x+h)) - cos(2x)] / h

Next, we use the trigonometric identity:

cos(a+b) = cos(a)cos(b) - sin(a)sin(b)

to rewrite the numerator in terms of cosines and sines:

cos(2(x+h)) - cos(2x) = [cos(2x)cos(2h) - sin(2x)sin(2h)] - cos(2x)

= cos(2x)(cos(2h) - 1) - sin(2x)sin(2h)

= -2sin^2(x)sin^2(h) / h

where we have used the double angle formula for cos(2h) and the identity sin(2x) = 2sin(x)cos(x).

Substituting this expression back into the definition of the derivative, we get:

f'(x) = lim h→0 [-2sin^2(x)sin^2(h) / h] = -2sin^2(x) lim h→0 [sin(h) / h]

We recognize the limit in brackets as the definition of the derivative of sin(x) at x=0, which is equal to 1. Therefore, we have:

f'(x) = -2sin^2(x)

So the derivative of cos(2x) with respect to x, evaluated using first principles, is:

d/dx [cos(2x)] = -2sin^2(x)

Bohr's model of the hydrogen

 Bohr's model of the hydrogen 

Bohr's model of the hydrogen atom is a way to explain how the electrons move around the nucleus of the hydrogen atom. It says that the electrons are in specific energy levels and can jump between these levels by absorbing or emitting energy in the form of light. This model helped explain why atoms emit light in specific colors and is an important part of our understanding of how atoms work.

another way 

Bohr's model of the hydrogen atom is a seminal concept in the field of atomic physics, proposed by Danish physicist Niels Bohr in 1913. The model describes the structure of the hydrogen atom as a positively charged nucleus, consisting of a single proton, surrounded by negatively charged electrons in circular orbits at fixed energy levels.

Bohr's model was a significant development in the understanding of the structure of atoms, as it explained the spectral lines of hydrogen observed in experiments at the time. The model provided a mathematical framework for predicting the wavelengths of light emitted or absorbed by hydrogen atoms when they transition between different energy levels.

However, Bohr's model is limited in its ability to describe the behavior of atoms beyond hydrogen, and was later replaced by more sophisticated quantum mechanical models that can describe the behavior of all types of atoms and molecules. Nonetheless, the principles underlying Bohr's model continue to play a central role in modern atomic physics and quantum mechanics.

bohrs postulates of atomic model 

Bohr's atomic model has three postulates, which are:

Electrons can only occupy certain fixed energy levels or shells.

Electrons can move from one energy level to another by absorbing or emitting a specific amount of energy.

The amount of energy emitted or absorbed when an electron moves between energy levels is equal to the difference in energy between the two levels.

In simpler terms, Bohr's model says that electrons orbit the nucleus in specific energy levels, and that they can move from one level to another by either gaining or losing energy. This explains why atoms only emit or absorb certain colors of light, and helps us understand the behavior of atoms in chemical reactions.

raoults law define and derivation 

Raoult's Law is a law of thermodynamics which describes the relationship between the vapor pressure of an ideal solution and the mole fraction of each component in the solution. The law is named after the French chemist François-Marie Raoult, who first proposed it in 1887.

Raoult's Law is a thermodynamic law that describes the relationship between the vapor pressure of an ideal solution and the mole fraction of each component in the solution. It states that the partial vapor pressure of a component is equal to the product of the vapor pressure of the pure component and its mole fraction in the solution. The law is derived by assuming that the solution is ideal and that the intermolecular forces between the components of the solution and the pure components are the same.

molecular formula

A molecular formula is a representation of a chemical compound that indicates the number and types of atoms present in a molecule. It shows the actual number of each type of atom in the molecule.

For example, the molecular formula for water is H2O, which means that a molecule of water contains two hydrogen atoms and one oxygen atom. Another example is the molecular formula for glucose, which is C6H12O6, indicating that a molecule of glucose contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.

Molecular formulas are important because they provide important information about the chemical composition of a substance, which is essential for predicting its chemical and physical properties.

Chemical equations

A chemical equation is a symbolic representation of a chemical reaction that shows the reactants and products involved in the reaction, as well as the physical states of the substances and the stoichiometric coefficients (or ratios) of the reactants and products.

A chemical equation is a symbolic representation of a chemical reaction that shows the reactants and products involved in the reaction, as well as the physical states of the substances and the stoichiometric coefficients (or ratios) of the reactants and products.

This equation shows that two molecules of hydrogen gas (H2) and one molecule of oxygen gas (O2) react to form two molecules of water (H2O), and that the reactants are gases while the product is a liquid. The stoichiometric coefficients in this equation indicate that two molecules of hydrogen and one molecule of oxygen are needed to form two molecules of water.

Chemical equations are important because they provide a concise way to represent chemical reactions and allow scientists to predict the outcome of a reaction based on the reactants involved.

Gas laws

Gas laws are a set of physical laws that describe the behavior of gases under different conditions, including changes in pressure, temperature, and volume. The most important gas laws include:

Boyle's law: This law states that at a constant temperature, the volume of a gas is inversely proportional to the pressure. Mathematically, this can be expressed as PV = constant, where P is the pressure, V is the volume, and the product of P and V is constant.

Charles's law: This law states that at a constant pressure, the volume of a gas is directly proportional to the absolute temperature. Mathematically, this can be expressed as V/T = constant, where V is the volume, T is the temperature in Kelvin, and the ratio of V and T is constant.

Gay-Lussac's law: This law states that at a constant volume, the pressure of a gas is directly proportional to the absolute temperature. Mathematically, this can be expressed as P/T = constant, where P is the pressure, T is the temperature in Kelvin, and the ratio of P and T is constant.

Combined gas law: This law combines Boyle's, Charles's, and Gay-Lussac's laws to describe the relationship between pressure, volume, and temperature. Mathematically, this can be expressed as PV/T = constant, where P is the pressure, V is the volume, T is the temperature in Kelvin, and the product of P and V divided by T is constant.

These gas laws are important for understanding the behavior of gases in various situations, such as in industrial processes, weather patterns, and the functioning of the human respiratory system.

The ideal gas equation

The ideal gas equation, also known as the general gas equation, is an equation that relates the pressure, volume, temperature, and number of moles of a gas. It is expressed as:

PV = nRT

where:

P = pressure of the gas (in units of pascals, Pa)

V = volume of the gas (in units of cubic meters, m^3)

n = number of moles of gas (in units of moles, mol)

R = the ideal gas constant, which has a value of 8.314 J/(mol·K)

T = temperature of the gas (in units of Kelvin, K)

The ideal gas equation is based on the assumptions that gas molecules are point masses with no volume, and that they do not interact with each other except through elastic collisions. While these assumptions are not true in reality, the ideal gas equation is a useful approximation for many practical purposes.

The ideal gas equation can be rearranged to solve for any of the variables in the equation, depending on what information is known. This equation is commonly used in various fields, such as chemistry, physics, and engineering, to calculate the properties of gases in different situations.

 

what is grahams law of diffusion 

Graham's law of diffusion, also known as Graham's law of effusion, states that the rate of diffusion or effusion of a gas is inversely proportional to the square root of its molar mass.

In other words, gases with lower molar mass will diffuse or effuse faster than gases with higher molar mass. This law is based on the kinetic theory of gases, which states that gases consist of a large number of small particles (atoms or molecules) that are in constant motion and collide with each other.

The mathematical expression of Graham's law is:

Rate of diffusion or effusion ∝ 1/√molecular mass

where the rate of diffusion or effusion is represented by the volume of gas that diffuses or effuses per unit time, and the molecular mass refers to the molar mass of the gas.

Graham's law has important applications in various fields, such as chemistry, physics, and engineering, where the diffusion or effusion of gases is an important factor to consider in the design and optimization of various processes and systems.

The electronic theory of valency 

The electronic theory of valency is a theory that explains how atoms form chemical bonds with each other by sharing, gaining, or losing electrons. An atom's valency is determined by the number of electrons in its outermost shell. Atoms tend to gain, lose, or share electrons to achieve a stable configuration, usually with a complete outer shell of eight electrons. This theory helps explain the formation of ionic and covalent bonds and the concept of oxidation states.

The electronic theory of valency is a theory that explains the chemical bonding and reactivity of atoms in terms of their electronic structure. According to this theory, the valency of an atom is determined by the number of electrons in its outermost shell, known as the valence shell.

The valence electrons of an atom are the electrons involved in chemical bonding and are responsible for forming chemical bonds with other atoms. The electronic theory of valency explains that atoms tend to gain, lose or share electrons in order to achieve a stable electronic configuration, usually by having a complete octet of electrons in their valence shell.

The VSEPR theory

VSEPR (Valence Shell Electron Pair Repulsion) theory is a model used in chemistry to predict the three-dimensional molecular geometry of covalently bonded molecules. The theory is based on the idea that electrons in the valence shell of an atom repel each other and thus determine the shape of the molecule.

According to VSEPR theory, the shape of a molecule is determined by the number of electron pairs (both bonding and nonbonding) surrounding the central atom. These electron pairs try to get as far away from each other as possible to minimize electron-electron repulsion, resulting in a characteristic molecular shape.

The VSEPR theory provides a set of rules to predict the shape of a molecule based on the number of electron pairs around the central atom, which can be summarized as follows:

Start by drawing the Lewis structure of the molecule.

Count the number of electron pairs (both bonding and nonbonding) around the central atom.

Determine the electron pair geometry by assuming that each electron pair occupies a specific region of space and arranging them as far apart as possible.

Determine the molecular geometry by considering only the bonding electron pairs and ignoring the nonbonding pairs.

The VSEPR theory can be used to predict the shapes of a wide variety of molecules, including simple diatomic molecules, triatomic molecules, and more complex molecules with multiple atoms. Understanding the molecular geometry of a molecule is important, as it can influence the molecule's physical and chemical properties, including its reactivity, polarity, and intermolecular forces.

isomerism define 

Isomerism refers to the phenomenon in which two or more chemical compounds have the same molecular formula but different arrangements of atoms within the molecule, resulting in different chemical and physical properties. In other words, isomers are different compounds with the same molecular formula.

There are different types of isomerism, including structural isomerism, stereo isomerism, and tautomeric isomerism, among others. Structural isomers have different arrangements of atoms within the molecule, while stereo isomers have the same arrangement of atoms but differ in their three-dimensional orientation. Tautomeric isomers differ in the placement of a hydrogen atom and a double bond within the molecule.

Isomerism plays an important role in many areas of chemistry, including organic chemistry, biochemistry, and materials science, as it can have a significant impact on the physical and chemical properties of a compound, including its reactivity, stability, and solubility.

in short 

Isomerism refers to the situation where two or more chemical compounds have the same molecular formula but different arrangements of atoms within the molecule, resulting in different properties. There are different types of isomerism, and it is an important concept in chemistry that affects the behavior and properties of chemical compounds.

structural isomerism, stereo isomerism, and tautomeric isomerism   define  

Structural isomerism: This type of isomerism refers to the situation where two or more compounds have the same molecular formula but different bonding arrangements. Structural isomers have different properties because the functional groups are attached in different ways.

Stereoisomerism: Stereoisomers have the same molecular formula and the same bonding arrangements but differ in their spatial arrangement. Stereoisomerism occurs when two or more compounds have the same connectivity of atoms, but they differ in the orientation of their functional groups in three-dimensional space.

Tautomeric isomerism: This type of isomerism involves the rapid interconversion of a pair of isomers through the movement of a proton. Tautomers are compounds that differ in the placement of a hydrogen atom and a double bond within the molecule, and they can exist in equilibrium with each other. Tautomeric isomerism is common in organic chemistry and biochemistry.

in short

Here are brief definitions for the three types of isomerism:

Structural isomerism: Same formula but different bonding arrangements.

Stereoisomerism: Same formula and bonding arrangements but different spatial orientation of functional groups.

Tautomeric isomerism: Rapid interconversion of a pair of isomers through the movement of a proton, resulting in different placement of a hydrogen atom and a double bond.

geometrical isomerism define 

Geometrical isomerism is a type of stereoisomerism in which the relative arrangement of atoms or groups around a double bond, a cyclic ring or an axis of rotation in a molecule is different. In other words, two molecules are geometrical isomers of each other if they have the same molecular formula, the same bonding pattern, but different spatial arrangements due to the restricted rotation around a bond.

Geometrical isomerism can occur in molecules with at least one double bond or a ring structure. In a double bond, the groups attached to the carbon atoms on either side can be oriented in one of two ways, either on the same side of the bond (cis) or on opposite sides of the bond (trans). In a ring structure, the positions of the substituents can be either cis or trans, depending on their relative orientation around the ring.

Geometrical isomerism can have important implications for the physical, chemical and biological properties of a molecule, including its reactivity, stability, and biological activity.

in short 

Geometrical isomerism is a type of stereoisomerism in which molecules have the same molecular formula and bonding pattern, but differ in their spatial arrangement due to restricted rotation around a bond. It can occur in molecules with a double bond or a ring structure and can affect the molecule's physical, chemical, and biological properties.

defenation of optical isomerism and its types 

Optical isomerism, also known as enantiomerism, is a type of stereoisomerism in which molecules have the same molecular formula and bonding pattern, but differ in the way they rotate plane-polarized light. Specifically, optical isomers are molecules that are non-superimposable mirror images of each other.

There are two types of optical isomers: enantiomers and diastereomers. Enantiomers are pairs of molecules that are mirror images of each other and cannot be superimposed, while diastereomers are pairs of molecules that are not mirror images of each other and can have different physical and chemical properties.

Enantiomers have identical physical and chemical properties, except for their ability to rotate plane-polarized light in opposite directions. They are often designated as "R" or "S" enantiomers based on the orientation of the molecule's chiral centers. Diastereomers, on the other hand, have different physical and chemical properties and can have different reactivities and biological activities.

Optical isomerism is important in fields such as organic chemistry, biochemistry, pharmacology, and materials science, as the different properties of enantiomers and diastereomers can have important implications for drug efficacy, toxicity, and stereochemical control in chemical reactions.

in  short 

Optical isomerism is a type of stereoisomerism where molecules have the same molecular formula and bonding pattern, but differ in the way they rotate plane-polarized light. There are two types of optical isomers: enantiomers and diastereomers. Enantiomers are mirror images of each other and have identical properties except for their ability to rotate plane-polarized light in opposite directions, while diastereomers have different properties and can have different reactivities and biological activities. Optical isomerism is important in fields such as chemistry, pharmacology, and materials science.

Lewis structure 

A Lewis structure is a diagram that shows the bonding between atoms in a molecule and the distribution of electrons in the molecule. It is named after Gilbert N. Lewis, who developed the concept in the early 20th century. The Lewis structure is also known as the Lewis dot diagram, Lewis dot structure, or electron dot structure.

In a Lewis structure, the symbol of each atom represents the atomic nucleus and the non-bonding valence electrons, which are shown as dots around the symbol. The bonding electrons are represented by a straight line or a pair of dots between the symbols of the atoms. Each atom is surrounded by its own set of dots, which represent its non-bonding electrons.

The Lewis structure is a useful tool for predicting the geometry, polarity, and reactivity of molecules. It can be used to determine the formal charge of each atom in a molecule, which is useful in predicting the most stable resonance structures. It is also helpful in identifying the presence of multiple bonds, lone pairs, and functional groups in organic molecules.

Overall, the Lewis structure is a simple and effective way of representing the chemical bonds and electron distribution in a molecule, providing important insights into its properties and behavior.

in short 

A Lewis structure is a diagram that shows the bonding between atoms in a molecule and the distribution of electrons in the molecule. It is a useful tool for predicting the geometry, polarity, and reactivity of molecules, as well as identifying the presence of multiple bonds, lone pairs, and functional groups in organic molecules. The Lewis structure is named after Gilbert N. Lewis and is a simple and effective way of representing the chemical bonds and electron distribution in a molecule.

hybridization 

Hybridization is a concept in chemistry that describes the mixing of atomic orbitals to form new hybrid orbitals that are energetically equivalent and have specific spatial orientations. This occurs when atoms in a molecule bond with each other, and the resulting hybrid orbitals are used to form the bonds between the atoms.

The most common type of hybridization is sp3 hybridization, which occurs when a central atom with four valence electrons bonds with four other atoms. In sp3 hybridization, the central atom's s and p orbitals combine to form four new hybrid orbitals, each with a specific spatial orientation that enables it to form bonds with the other atoms.

Other types of hybridization include sp2 hybridization, which occurs when a central atom with three valence electrons bonds with three other atoms, and sp hybridization, which occurs when a central atom with two valence electrons bonds with two other atoms. These different types of hybridization lead to different geometries and shapes of molecules, which have important implications for their physical and chemical properties.

in short 

Hybridization is a process in chemistry where atomic orbitals combine to form new hybrid orbitals that are energetically equivalent and have specific spatial orientations. This process enables the formation of chemical bonds between atoms in a molecule and leads to the creation of different geometries and shapes of molecules, which have important implications for their physical and chemical properties.

zoology exam based question

 

Q  Define simple epithelial tissue , describe structure location and function of different type of simple epithelial tissue .

ans.     Simple epithelial tissue is a type of tissue that is composed of a single layer of cells that are tightly packed together. This tissue can be found lining the cavities and surfaces of the body, where it functions to provide a protective barrier, regulate the exchange of materials between different areas, and secrete or absorb substances as needed. There are three main types of simple epithelial tissue:

Simple squamous epithelium: This tissue is composed of a single layer of flattened cells that are tightly packed together. It is found lining the walls of blood vessels, air sacs in the lungs, and the lining of body cavities. The thin, flat cells of this tissue make it ideal for allowing for rapid diffusion of gases and other small molecules across its surface.

Simple cuboidal epithelium: This tissue is composed of a single layer of cube-shaped cells that are tightly packed together. It is found lining the walls of small ducts and glands, such as those in the kidney and thyroid gland. The cells of this tissue are specialized for secretion and absorption, and their shape allows them to facilitate the movement of substances across the surface.

Simple columnar epithelium: This tissue is composed of a single layer of elongated, column-shaped cells that are tightly packed together. It is found lining the walls of the digestive tract, uterus, and uterine tubes. The cells of this tissue are specialized for absorption and secretion, and they often have microvilli or cilia on their surface to increase their surface area and facilitate movement of materials.

Pseudostratified columnar epithelium: This tissue appears to be composed of multiple layers, but is actually composed of a single layer of elongated cells of varying heights. It is found lining the respiratory tract, where it functions to move mucus and debris out of the airways.

Transitional epithelium: This tissue is found in the urinary system, specifically lining the bladder and ureters. It is capable of stretching and changing shape as the volume of urine in the bladder changes.

Simple ciliated columnar epithelium: This tissue is similar to simple columnar epithelium, but with the addition of cilia on the surface of the cells. It is found lining the respiratory tract, fallopian tubes, and some parts of the brain. The cilia help to move mucus, fluids, or particles across the surface of the tissue.

Overall, simple epithelial tissue is essential for the proper functioning of many parts of the body. It provides a protective barrier, facilitates the exchange of materials, and is involved in secretion and absorption of substances. Different types of simple epithelial tissue have unique structures and functions that allow them to perform specialized tasks in different parts of the body.

Q. Define connective tissue ,structure,  type , function, location . 

ans. Connective tissue is a type of tissue that provides support and structure to the body. It is composed of cells and extracellular matrix, which is made up of fibers and ground substance. The cells of connective tissue are often surrounded by this matrix and secrete it as well.

structure of its 

basically a connective tissue is composed of three components -; cell , fibres and matrix .

The cells of connective tissue can include fibroblasts, chondrocytes, adipocytes, and osteocytes, among others, and they are responsible for secreting and maintaining the extracellular matrix.

The extracellular matrix is made up of a combination of fibers and ground substance, which varies depending on the type of connective tissue. The fibers include collagen, elastin, and reticular fibers, which give the tissue its strength, elasticity, and support. The ground substance is composed of glycosaminoglycans, proteoglycans, and glycoproteins, which provide cushioning and hydration to the tissue.

In loose connective tissue, the fibers and cells are loosely arranged, allowing for movement and diffusion of substances. Dense connective tissue, on the other hand, has densely packed collagen fibers that provide strength and durability. Adipose tissue is composed of adipocytes, which store energy in the form of triglycerides, while cartilage and bone have a matrix that is made up of collagen fibers and other specialized components such as proteoglycans and mineralized calcium.

type of its 

Loose connective tissue: This tissue is composed of loosely arranged fibers and cells. It can be found throughout the body, where it functions to provide support and cushioning to organs, as well as allowing for the movement and diffusion of substances.

a.  Areolar ;-Areolar tissue is a type of connective tissue that is made up of loosely arranged fibers, including collagen and elastic fibers, and a gel-like ground substance. It contains a variety of cell types, including fibroblasts, macrophages, and mast cells. Areolar tissue is found throughout the body and provides support, cushioning, and flexibility to organs and tissues. It also allows for the diffusion and movement of substances, and plays a role in immune function.

b. Adipose ;- Adipose tissue, also known as fat tissue, is a type of connective tissue that is composed of adipocytes, or fat cells, which store energy in the form of triglycerides. Adipose tissue is found throughout the body, but is particularly abundant in subcutaneous tissue and around organs. It provides insulation, cushioning, and protection to organs, as well as serving as a source of energy for the body. Adipose tissue also produces hormones and signaling molecules that play a role in metabolism and inflammation.

Dense connective tissue: This tissue is composed of densely packed collagen fibers, which give it strength and durability. It is found in tendons, ligaments, and the dermis of the skin, where it provides support and stability to these structures.

a. white fibrous tissue ;-White fibrous tissue, also known as dense regular connective tissue, is made up of densely packed collagen fibers that are arranged in parallel bundles. It provides strength, durability, and resistance to stretching, and is found in structures such as tendons, ligaments, and aponeuroses. Tendons connect muscles to bones and transmit forces generated by muscle contraction, while ligaments connect bones to other bones and help stabilize joints. Aponeuroses are flat, sheet-like tendons that attach muscles to other muscles or to bone.

b. yellow elastic tissue ;- Yellow elastic tissue, also known as elastic connective tissue, is made up of elastic fibers that provide elasticity and flexibility to the tissue. It is found in structures such as the lungs, walls of blood vessels, and the vocal cords. The elastic fibers allow these structures to stretch and recoil without tearing, while still maintaining their shape and function.

Cartilage: This tissue is composed of chondrocytes, which are embedded in a matrix of collagen fibers and proteoglycans. It is found in areas such as the nose, ears, and joints, where it provides a smooth surface for movement and shock absorption.

a. Hyaline Cartilage:- Hyaline cartilage is a type of cartilage that is found in the joints, ribcage, and respiratory tract. It is made up of a gel-like matrix of collagen and proteoglycans, which provides cushioning and support to the bones and joints. Hyaline cartilage is also involved in growth and development, as it serves as a template for bone formation during ossification.

b. Elastic Cartilage:-Elastic cartilage is a type of cartilage that is found in the ears, epiglottis, and larynx. It is similar in structure to hyaline cartilage, but contains more elastic fibers, which provide greater elasticity and flexibility to the tissue. This allows the tissue to maintain its shape and function even after repeated bending and stretching.

c. Fibro Cartilage:- Fibrocartilage is a type of cartilage that is found in areas of the body where there is high stress and pressure, such as the intervertebral discs and knee joints. It is composed of a dense network of collagen fibers that are arranged in parallel bundles, which provides strength and durability to the tissue. 

d. Calcified Cartilage:-Calcified cartilage is a type of cartilage that is found in the growth plates of developing bones, as well as in areas where cartilage attaches to bone.

Bone: This tissue is composed of osteocytes, which are embedded in a matrix of collagen fibers and calcium salts. It is found in the skeleton, where it provides support, protection, and allows for movement

a. spongy bone;-Spongy bone, also known as cancellous or trabecular bone, is a porous type of bone tissue that is found at the ends of long bones, in the vertebrae, and in the flat bones of the skull. It is made up of a network of bony spicules, or trabeculae, that form a lattice-like structure.

b. compact bone ;- Compact bone, also known as cortical bone, is a dense type of bone tissue that forms the outer layer of bones and the shafts of long bones. It is made up of tightly packed osteons, which are cylindrical structures that contain layers of bone tissue surrounding a central canal.

Connective tissue has several important functions in the body, 

Providing support and structure: Connective tissue provides support and structure to the body, from the framework of the skeleton to the soft tissue structures that support and protect organs. It provides strength, stability, and shape to the body.

Facilitating movement: Many types of connective tissue are involved in facilitating movement, from tendons and ligaments that connect muscles and bones, to cartilage that provides a smooth surface for joint movement. Connective tissue also helps to absorb shock and distribute forces during movement.

Storing and transporting materials: Adipose tissue stores energy in the form of triglycerides, while bone stores calcium and other minerals. Blood, a type of connective tissue, transports oxygen, nutrients, and other important substances throughout the body.

Providing protection: Connective tissue provides protection to various organs and tissues, such as the skull protecting the brain or the dermis of the skin protecting the internal organs from environmental hazards.

Supporting immune function: Some types of connective tissue, such as lymphoid tissue, contain immune cells that help protect the body from foreign substances and pathogens

लुम्बिनी प्रदेशमा मन्त्री मण्डल बिस्तार

 लुम्बिनी प्रदेशमा मन्त्री मण्डल बिस्तार नवनियुक्त माननिय मन्त्रीज्यु हरुलाई एकमुष्ठ बधाई तथा सफल कार्यकालकाे प्रचण्ड शुभकामना! 🙏

नेपाली व्याकरण पदबर्ग /वर्ण/घोषत्व/ प्राणत्व/

     

क)   नेपाली स्वरवर्ण

अन्य वर्णको सहायता नलिई आफैँ उच्चारण हुनसक्ने ध्वनि स्वर ध्वनि हुन्। श्वासप्रवाहमा कुनै बाधा नभई उच्चारण गर्न सकिन ध्वनि स्वर ध्वनि हुन्। नेपालीमा लेख्य परम्परामा निम्न तेह्र प्रकारका स्वरवर्ण छन् - अ, आ, इ, ई, उ, ऊ, ऋ, ए, ऐ, ओ, औ, अं, अः ।

उच्चारणका हिसाबले नेपाली स्वरवर्ण जम्मा ६ प्रकारका मात्रै छन् – अ, आ, इ, उ, ए, ‌ओ । अतिरिक्त लेख्य चिन्ह ई, ऊ, ऋ, ऐ, औ, अं, अः लेख्य परम्पारामा मात्रै प्रयोग हुन्छन् ।

नेपाली स्वर वर्णलाई उच्चारण गर्दा हुने उच्चारण अवयवको भूमिका अनुसार निम्नजलिखित तरिकाले वर्गीकरण गरिएको पाइन्छ ।

·         मांसपेशीको आधारमा [दृढ स्वर इ  आ उ शिथिल स्वर ए अ ओ]

·         जिब्रोको सक्रिय भाग (अग्र इ ए, केन्द्रीय आ र पश्च उ ओ अ)

·         जिब्रोको उचाइ(उच्च उ इ, उच्च-मध्य ए ओ, निम्न-मध्य अ र निम्न आ)

ख)   नेपाली व्यञ्जनवर्ण

ध्वनिको उच्चारण गर्दा श्वासप्रवाहमा बाधा भएर उच्चारण हुने वर्ण  वर्ण व्यञ्जनवर्ण हुन् । व्यन्जनवर्ण उच्चारण गर्न स्वरको सहायता आवश्यक पर्छ । नेपाली लेख्य परम्परामा छत्तीस प्रकारका व्यन्जनवर्णको प्रयोग भएको पाइन्छ। ती निम्नअनुसार छन् –

क     ख     ग      घ      ङ     

च      छ     ज      झ     ञ

ट      ठ      ड      ढ      ण

त      थ      द      ध      न

प      फ     ब      भ      म

य      र      ल     व

श     ष      स      ह

क्ष     त्र      ज्ञ

यसरी व्यन्जनको जम्मा सङ्ख्या छत्तीस देखिए पनि क्ष, त्र र ज्ञ संयुक्त व्यन्जन हुन् । श,ष र स को उच्चारण ‘स’नै हुन्छ । ञ र ण को पनि अन्य वर्णबाट सम्भव हुन्छ। यसरी उच्चार्य नेपाली व्यन्जन वर्ण निम्न मात्रै छन् –

क     ख     ग      घ      ङ     

च      छ     ज      झ    

ट      ठ      ड      ढ     

त      थ      द      ध      न

प      फ     ब      भ      म

य      र      ल     व

स      ह

नेपाली उच्चार्य परम्पारामा प्रयोगमा नआएका वर्ण लेख्य परम्पारामा र व्याकरणको दृष्टिमा अनिवार्य छन्।

(अ)   उच्चारण स्थानको आधारमा नेपाली व्यञ्जन

उच्चारण गर्दा घाँटीदेखि ओठसम्म सास रोकिने स्थानको आधारमा व्यञ्जनवर्णको उच्चारण हुने स्थान पक्का गरिन्छ । उच्चारण स्थानका आधारमा वर्णको वर्गीकरण निम्न अनुसार देखाइएको छ :

१)     अतिकण्ठ्य (स्वरयन्त्रमुखी)

घाँटीको तल्लो भाग वा श्वासनलीको मुखबाट उच्चारण हुने वर्ण- ह ।

२)     कण्ठ्य (कोमलतालु) ‌

नाक र मुखको प्वाल छुट्टिने ठाउँदखि बाहिरपट्टि तालुको गिलो भाग हुन्छ । यसको ठीक तल जिब्रोको पश्च भाग हुन्छ । त्यही कोमल भागबाट उच्चारण हुने वर्ण – क, ख, ग, घ, ङ ।

३)     तालव्य

कोमलतालुभन्दा बाहिरतर्फ साह्रो र चिल्लो भाग तालु हो । यो स्थानबाट उच्चारण हुने वर्ण : य

४)     वर्त्स्य (दन्तमूलीय)

तालुको चिल्लो भाग सकिएपछि दाँतको फेदसम्मको भागबाट उच्चारण हुने वर्णहरू च, छ, ज, झ, ट, ठ, ड, ढ, न, र, ल, स दन्तमूलीय हुन् ।

५)     दन्य

माथिल्ला दाँतका लहरमा जिब्रोले छोएर उच्चारण हुने वर्ण त, थ, द, ध दन्य हुन् ।

६)     ‌ओष्ठ्य

तल्लो ओठ र माथिल्लो ओठको सक्रियताबाट उच्चारण हुने वर्ण प, फ, ब, भ, म, व ओष्ठ्य हुन् ।

उच्चारण स्थानको आधारमा नेपाली व्यञ्जन                   

(आ)  उच्चारण प्रयत्नका आधारमा नेपाली व्यञ्जन

वर्ण उच्चारण गर्दा उच्चारण हुने स्थान र त्यसलाई छुने अवयव (करण)का कारणले श्वासमा प्रभाव पर्छ। जिब्रो, ओठ आदि गतिशील अङ्गले छोएर श्वासमा प्रभाव हुनु उच्चारण प्रयत्न हो । उच्चारण प्रयत्नका आधारमा वर्णको वर्गीकरण निम्न अनुसार देखाइएको छ :

१)     स्पर्शी

उच्चारण हुने स्थान र त्यसलाई छुने अङ्ग वा करण ट्याप्प जोडिएर सास पूरै रोकिएर उच्चारण हुने वर्ण  स्पर्शी हुन् ।       क    ख     ग     घ           ट     ठ     ड     ढ

                   त    थ     द     ध           प     फ    ब     भ

२)     सङ्घर्षी

उच्चारण अवयव (उच्चारण हुने स्थान र त्यसलाई छुने अङ्ग) हल्कासँग टाँसिएर सुसाउँदै सास बाहिर निस्कने वर्ण सङ्घर्षी हुन् ।  स     ह

३)     स्पर्ष-सङ्घर्षी

पहिले स्पर्श विधिमा जस्तै ट्याप्पै जोडिने र पछि सङ्घर्षीमा जस्तै हल्का टाँसिएर उच्चारण हुने वर्ण स्पर्ष-सङ्घर्षी हुन् ।    च     छ     ज     झ

४)     नासिक्य

यस्ता वर्णको उच्चारणमा नाकबाट सास जान्छ ।      ङ     न    म

५)     कम्पित

सासको जोडले जिब्रो थर्किएर उच्चारण हुन्छ ।       र

६)     पार्श्विक

जिब्रोको उच्चारण स्थानमा छुने तर छेउबाट सास गएर उच्चारण हुन्छ ।       ल

७)     अर्धस्वर

सास नरोकिने वा हलन्त उच्चारण नहुने वर्ण अर्धस्वर हुन् ।    य     व

उच्चारण प्रयत्नका आधारमा नेपाली व्यञ्जन

(इ)   घोषत्वको आधारमा नेपाली व्यञ्जन (स्वरतन्त्रीको अवस्था)

श्वासनलीको मुखमा स्वरचिम्टी वा स्वरयन्त्री हुन्छ । यो मासुको दुई पत्रले बनेको  र खुल्ने बन्द हुने स्वभावको हुन्छ ।यसको आधारमा  वर्णलाई दुई प्रकारले विभाजन गर्न सकिन्छ ।

१)     घोष (सघोष)

स्वरचिम्टी हल्का जोडिएर हावाको जोडले घर्षण हुँदै उच्चारित हुन्छन् ।

ग     ज     ड     द     ब           घ     झ     ढ     ध     भ

ङ     न     म                       य     र     ल     व     ह

२)     अघोष

स्वरचिम्टी निकट रहन्छ । कम्पन वा घर्षण नभई उच्चारण हुन्छन् ।

क    च     ट     त     प           ख     छ     ठ     थ     फ    स

घोषत्वको आधारमा नेपाली व्यञ्जन (स्वरतन्त्रीको अवस्था)

(ई)  प्राणत्वको आधारमा नेपाली व्यञ्जन (सासको मात्रा)

वर्णहरूको उच्चारणमा फोक्सोबाट निस्कने सासको मात्रा  कम र बढी हुनेगर्दछ । यस आधारमा महाप्राण र अल्पप्राण गरेर नेपाली वर्णलाई दुई भागमा विभाजन गरिएको पाइन्छ ।

१)     अल्पप्राण

उच्चारण गर्दा श्वासको शक्ति कम भएमा अल्पप्राण व्यञ्जनवर्ण हुन्छन् ।

क    च     ट     त     प           ग     ज     ड     द     ब

ङ     न     म                       य     र     ल     व

२)     महाप्राण

उच्चारण गर्दा श्वासको शक्ति कम भएमा महाप्राण व्यञ्जनवर्ण हुन्छन् ।

ख     छ     ठ     थ     फ          घ     झ     ढ     ध     भ

स     ह

     

पदबर्ग 

१) नाम :-

क) व्यक्ति, ठाउँ, वस्तु, समूह, भाव (देख्न वा सुन्न नसकिने) गीता, राम, किताब, रूख, चरा, सगरमाथा, नेपाल, हुल, ताँती, मुठी, पाप, धर्म, पढाई, लेखाइ, दुःख.

ख) वाक्यको मुख्य पात्र नै नाम हो।

२) सर्वनाम :-

म, हामी, त, तिमी, तपाईं, हजुर, ऊ, उनी, ती, तिनी, थी, चीनी, उहाँ, आफू

३) क्रिया (क्रियापद) :-

- म भात खान्छु ।

. साथी घर जान्छ ।

क) अन्त्यमा नु" लाउने

खानु, जानु, भन्नु, सुत्नु, उठ्‌नु

ख) हटाउदा वाक्यको अर्थ पुरा नहुने ।

४) विशेषण :-

(नामको बारेमा बताउने

- कति ?, धेरै, कम, थोरै, एक, दुई, पहिलो, दोस्रो

कस्तो? रातो, निलो, गोरो, कालोँ, होचो, अग्लो

- कुन ? कसको कस्को ? यो, त्यो, जन, ने, मेरो, तेरो, उसको

५) क्रियायोगी/ क्रियाविशेषण :-   (क्रियाको बारेमा बताउने ।

- कसरी ? फटाफट, थुचुक्क, राम्ररी, यसरी, त्यसरी

1 कहिले? हिजो, आज, भरे, सधै, जहिल्यै, दिउँसो, बिहान )

कहाँ? त्यहाँ, यहाँ, पछि, अघि, तल, माथि, भित्र, बाहिर

- किन ? पढ़नाले, भएकाले, गरेकीमा, बस्नाले कति? धेरै, थोरै, अलिकति, यति, त्यति

६) नामयोगी - 

पोखरादेखि रात भरि दारभित्र स्कूलतर्क कितावबिना, बोल्नुसट्टा मसँग, घुम्न भन्दा

७) संयोजक:-

- जे, जुन, जे जे, जहिले, जहाँ, जब, तब, र, भने, अनि जब पानी पर्छ तब बाटो हिलो हुन्छ।

८) विस्मयादिबोधक:

हा! हा!, धन्य!, ओहो!, हे!, घत!

९) निंपात :

 ए, नि, क्यारे, हमि, माच्चै, बारे, पो, ल, खै

सप्रसङ्ग व्याख्या लेखन /नैतिक दृिष्टानट/छिमेकी/सिपाही/

  

पाठ; एक 

मूलपाठ. नैतिक दृिष्टानट

यस नैतिक दृष्टान्त (१९७४) कविका रचनाकार कविशिरोमणि लेखनाथ पौड्याल (वि.सं. १९४१ - २०२२, सन् 1885 – 1966) हुन् । उनी नेपाली साहित्यका परिष्कारवादी धारका छन्दोबद्ध कवि थिए । उनलाई नेपाली साहित्यमा आधुनिक युगको जन्मदाता, आध्यात्मिक पुनर्जागरण ल्याउने तथा आध्यात्मिक मानवतावादी कविका रूपमा पनि चिनिन्छ ।

यस कवितामा कवि लेखनाथ पौड्यालले प्रकृति र धर्म/संस्कृतिबाट विविध उदाहरणहरूका साथ नीतिशिक्षा दिएका छन् ।

बडाले जो गर्यो काम हुन्छ त्यो सर्व-संमत ।

छैन शङ्करको नङ्गा, मगन्ते भेष निन्दित ।। १ ।।

गर्दैन ठूलो व्यक्ति मर्यादा-स्थिति-लङ्घन ।

बसेको छ महासिन्धु सीमाबद्ध बनीकन ।। २ ।।

दबिन्छ गुणिको दोष गुणका राशिमा परी ।

रश्मिले चन्द्रको दाग दबाएकै छ बेसरी ।। ३ ।।

कसैको लोकमा छैन एकैनास समुन्नति ।

अरूको के कुरा हेर सन्ध्यामा सूर्यको गति ।। ४ ।।

छोटो बढ्यो भने ज्यादा फूर्ति ढाँचा बढाउँछ ।

उर्लँदो खहरे हेर कत्तिको गड्गडाउँछ ।। ५ ।।

ज्यादा सोझो हुनूभन्दा टेढिनु छ फलाऽधिक ।

गरदैन कुनै सोझो ग्रहको पूजनाऽऽदिक ।। ६ ।।

टपर्टुञ्या पनि हुन्छ मूर्खमध्ये प्रतिष्ठित ।

बोलने को अँध्यारोमा महाऽऽत्मा जुन्किरीसित ।। ७ ।।

सानै देखी छुचो हुन्च दुष्ट मानिसकि मति ।

घोचने जङ्गली काँढा पहिले नै तिखा कति ।। ८ ।।

मिलेर काम गर्नाले हुन्छ अत्यन्त फायदा ।

एकता हेर कस्तो छ मौरीको महमा सदा ।। ९ ।।

जो दिँदैन उही दिन्छु भनी गर्जन्छ सत्त्वर ।

जो हो नवर्षने मेघ उसैको हुन्छ घर्घर ।। १० ।।

हुनुपर्दछ मौकामा शत्रुको पनि सेवक ।

कोइली कागकै बच्चा बन्छ सानू छँदा तक ।। ११ ।।

गुणग्राही जहाँ छैन वहाँ के गरला गुणी ।

कौडीमा तक मिल्कन्छ भिल्लका देशमा मणि ।। १२ ।।

योग्य  स्थानविषे मान सानाले पनि पाउँछ ।

कृष्णाका तटको ढुङ्गा देवता कहलाउँछ ।। १३ ।।

उपकारी गुणी व्यक्ति निहुरन्छ निरन्तर ।

फलेको वृक्षको हाँगो नझुकेको कहाँ छ र ।। १४ ।।

मेटिँदैन कसैबाट आफनू कर्मपद्धति ।

बनवासी बनेर राम चौधै भुवनका पति ।। १५ ।।

धर्म हो धीरको धैर्य राखनू दु:खजालमा 

मानू मौनव्रती हुन्छ कोइली शीतकालमा ।। १६ ।।

सारा सार लिई कन्था छोडी-दिन्छ गुणी जन ।

रस चुसेपछि भृङ्ग फूलमा भुल्दथ्यो किन ? ।। १७ ।।

सङ्गले पनि जाँदैन दुष्टको दुष्टता रिस ।

श्रीखण्डमा बसी सर्प कहाँ हुन्थ्यो र निर्विष ।। १८ ।।

मूर्खका मनमा अर्ती गालीतुल्य बिझाउँछ ।

दूधपान गरी सर्प खालि विष बहाउँछ ।। १९ ।।

मुला भाब ;=  

ठूलाले गरेका कार्यलाई सबैले मान्दछन्, जसरी भगवान् शिवको नाङ्गो र मगन्ते भेष कहीँ निन्दा गरिएको छैन ।

ठूला व्यक्तिहरूले आफ्नो मर्यादा नाघ्न हुँदैन, जसरी ठूलाठूला नदी/समुद्रहरू आफ्ना सीमामै बसेका हुन्छन् ।

गुणी मानिसको थोरै दोष भए पनि दबिन्छ, जसरी चन्द्रमा तेजले उसको दाग छोप्दछ ।

संसारमा कसैको एकैनास उन्नति हुँदैन, अर्थात् उतार-चढाव हुन्छ नै । नत्र साँझमा सूर्यको गति हेर्दा हुन्छ ।

सानो मानिस एकैचोटि बढ्दा फूर्ति बढाउँछ, जसरी उर्लँदो खहरे बेस्सरी गड्गडाउँछ ।

सोझो हुनुभन्दा केही हदसम्म टेढिनु राम्रो हुन्छ । ग्रह सोझो भए कसैले पनि पूजा गर्दैनथे ।

मूर्खमध्ये जस्तोसुकै मूर्ख पनि प्रतिष्ठित हुन्छ । अँध्यारोमा जुनकिरीसँग बोल्न को महात्मा आउँछ ?

दुष्ट मतिका मानिस सानैदेखि छुच्चो हुन्छ, जसरी घोच्ने जङ्गली काँडाहरू पहिले कति तीखा हुन्छन् ।

सँगै मिलेर एकजुट हुनु फाइदाजनक छ, जसरी मौरीले मह पार्दा एकजुट हुन्छ ।

जो काम गर्दैन, उसैले बढी हल्ला गर्छ । त्यसैले त नवर्षिने मेघले नै सधैँ घर्घर गर्छ ।

मौका पर्दा शत्रुको पनि सेवा गर्नुपर्छ, जसरी कोइली सानोमा कागकै बच्चाझैँ हुर्कन्छ ।

गुण नमान्ने ठाउँमा गुणीले के गर्न सक्ला । भिल्लहरूका देशमा मणिजस्तो बहुमूल्य चीज कौडीमा समेत मिल्काइन्छ ।

उचित स्थानमा बस्दा सानाले पनि मान पाउँछ, जसरी कालीगण्डकी नदीका तीरको ढुङ्गा पनि शालिग्राम देवताका रूपमा पुजिन्छ ।

गुणी व्यक्ति सधैँ निहुरिन्छ अर्थात् आफूलाई ठूलो ठान्दैन, जसरी फलसहितको हाँगो झुकेकै हुन्छ ।

आफ्नो भाग्यमा लेखिएको कुरा कसैले मेटाएर मेट्दैन, त्यसैले त चतुर्दश भुवनका स्वामी श्रीराम वनवासमा जानुभयो ।

दुःख पर्दा धैर्य राख्नु धर्म हो, जसरी जाडोयाममा कोइली गाएको सुनिँदैन अर्थात् मौनव्रतमा बसेझैँ हुन्छ ।

गुणीले सार वा भाव मात्र लिन्छ र वस्तुको मोह गर्दैन, किनकि भमराले रस चुसेपछि फूलमै वास बस्दैन ।

दुष्ट मानिस असलका संगतमा रहँदा पनि दुष्ट नै हुन्छ, जसरी श्रीखण्डमा बसे पनि सर्पको विष यथावत् नै हुन्छ ।

मूर्खलाई केही अर्ती दिँदा गाली गरेझैँ लाग्छ । त्यस्तै, दूध खाए पनि सर्प मात्र आफ्नो विष बढाउँछ ।

सप्रसङ्ग व्याख्या गर्नुहोस 

खण्ड क (प्रथम अनुच्छेद)

(क) सप्रसङ्ग व्याख्या गर्दा सबैभन्दा पहिला दिइएको गद्यांश पद्यांश सुरु र अन्त्यका पदावलीका बीचमा थोप्ला चिह्न दिई सुरु गर्ने (समय भएमा पूरै पङ्क्ति सार्ने)

I (ख) सम्बन्धित अंश कुन पाठ्यपुस्तकको कुन पाठको कुन विधाबाट साभार गरिएको हो स्रोत उल्लेख गर्ने ।

(ग) रचनाकार /लेखक / सम्पादकका नाम उल्लेख गर्नुपर्छ । (पाठमा उल्लेख भए) (घ) उक्त अंश कसले कसलाई कुन अवस्थामा भनेको हो, उल्लेख गर्ने । (ङ) दिइएको गद्यांश पद्यांश कुन प्रसङ्गमा आएको हो, खुलाउने ।

व्याख्या खण्ड ख, (दोस्रो अनुच्छेद)

(क) पूर्व प्रसङ्ग गद्यांश पद्यांशको पाठबाट नजिकको सम्बन्ध देखाउनुपर्छ । (ख) विभिन्न तर्क र उदाहरण प्रस्तुत गर्दै उक्त अंशको व्याख्या र विश्लेषणद्वारा भावको पुष्टि गर्नुपर्छ ।

(ग) सारतत्वको पहिचान र पुष्टि गर्नुपर्छ

निष्कर्ष खण्ड ( अन्तिम अनुच्छेद)

(क) मूल व्याख्यामा भनिएको कुराहरुको निचोड दिनुपर्छ ।

(ख) सम्बन्धित अंशमा रहेका भाषाशैली, अलङ्कार, बिम्ब र प्रतीकहरुको जानकारी र महत्व बोध गरी लेख्नुपर्छ।

अभ्यास एक 

उपाकारी गुणी ब्याक्ति  निहुरिन्छ निरन्तर

फालेको बृक्षको हागो नझुकेको काहाँ छ र 

उत्तर;-   यस नैतिक दृष्टान्त (१९७४) कविका रचनाकार कविशिरोमणि लेखनाथ पौड्याल (वि.सं. १९४१ - २०२२, सन् 1885 – 1966) हुन् । उनी नेपाली साहित्यका परिष्कारवादी धारका छन्दोबद्ध कवि थिए । उनलाई नेपाली साहित्यमा आधुनिक युगको जन्मदाता, आध्यात्मिक पुनर्जागरण ल्याउने तथा आध्यात्मिक मानवतावादी कविका रूपमा पनि चिनिन्छ ।यस कवितामा कवि लेखनाथ पौड्यालले प्रकृति र धर्म/संस्कृतिबाट विविध उदाहरणहरूका साथ नीतिशिक्षा दिएका छन् ।   

माथि उल्गुलेखित पग्ति मा गुणी व्यक्ति सधैँ निहुरिन्छ अर्थात् आफूलाई ठूलो ठान्दैन, जसरी फलसहितको हाँगो झुकेकै हुन्छ | गुणी ब्याक्ति सधै गुण ले भरि पूर्ण रहेका ले गर्दा त्यास ब्याक्यी मा  झुकाब सधै रहन्छ |  कबि ले यस कबिता मा मानिस मा हुने बिभिन्न किसिम का नैतिक जिम्मेवारी उल्लेख गरेका छन् |   

कवीले माथि को पग्ति मा ब्याक्ति मा रहेने गुण का कारण ले नै उक्त्त ब्याक्ति त्यो स्थान हासिल  गरेको हुन्छ 

पाठ दुई

छिमेकी 

छिमेकी कथा नेपाली साहित्यकार गुरुप्रसाद मैनालीद्वारा लिखित नेपाली कथा हो। यो कथा मैनालीको नासो कथासङ्ग्रहमा सङ्ग्रहित कथा हो।

समीक्षा

छिमेकी कथा सामाजिक समस्याहरु प्रस्तुत गरी आदर्श समाधान पहिल्याउने आदर्शोन्मुख यथार्थवादी कथाकार गुरुप्रसाद मैनालीको छोटो आकारको प्रभावशाली कथा हो । यसको क्षेत्र गाउँ रहेको छ । छिमेकीहरूको बीचमा स-साना कुरामा असमझदारी भई ठूला-ठूला समस्या उत्पन्न हुने यथार्थलाई यसमा देखाइएको छ ।

भाषा, शैली संवाद

यस छिमेकी कथाका प्रत्येक शब्दहरु सरलता र सहजताले भरिएका छन ।वाक्यहरु छोटा छोटा रहेका छन् । कथामा कतै वर्णन त कतै संवादद्वारा कथा रचिएको छ। वर्णनमा सरलता छ भने संवादमा स्वाभाविकता छ। गुमाने र धनजितेले गाउँले र अशिक्षितले बोल्ने भाषा बोल्दछन्। त्यस्तै आशामरु साहूको संवादमा नेवारी लवज छ। यस कथाको शैली पनि सरल र रैखिक ढाँचामा छ ।कथामा आदि मध्य र अन्त्यको रैखिक शैलीमा बढेको छ। अन्तत: भाषा, संवाद र शैलीका दृष्टिकोणबाट हेर्दा यो कथा सरल, सहज, स्वाभाविक र प्रभावकारी छ।

कथासार

´छिमेकी` कथामा गुमाने र धनजिते दुईजना छिमेकी छन्। असारको समय छ, खेत रोप्ने बेला छ। चौतारामा गाउँलेहरु जम्मा भएका छन्। गुमानेको गोरु धनजितेको खेतको बिउमा पस्छ र धनजितेले गोरुलाई बेस्सरी पिट्दै धपाउँछ । वर्षायामका आफ्ना गोरुलाई बेस्सरी पिटेको देखेपछि गुमाने रिसाउँछ र दुबैका बीचमा झगडा हुन्छ । गाउँको भँडुवा धर्मानन्द पाध्याले गुमानेलाई उक्साउँछ र झगडा हातपातसम्ममा पुग्छ । छिमेकीहरूले गुमाने र धनजितेलाई छुट्याउँछन् तर दुबैमा रिस बाँकी रहन्छ । दुबै छिमेकीहरूमा बोलचाल तथा अर्म-पर्म र असल व्यवहार बन्द हुन्छ । केही समय पछि गाउँमा आँठे रोगको महामारी फैलिन्छ त्यसको चपेटामा धनजिते र उसको परिवार पर्छ । आँठेले इन्तु न चिन्तु भई लडेको धनजितेको दयनीय अवस्था देखेर गुमानेको मन पग्लन्छ । उसले मन लगाएर धनजितेको सेवा गर्छ । सेवा नगर्न र आफ्नो भारी बोक्न गए चलनचल्तीभन्दा धेरै ज्याला दिने लोभ आसामरु साहुले देखाउँछ । यो लोभमा नपरी गुमानेले उल्टै छिमेकीको महत्त्व बुझाउँछ । सन्चो भई बिउँझेपछि धनजितेले गुमानेको प्रेम र उसको मनमा आफूप्रतिको माया र सद्भाव देख्छ ।उसलाई विगतप्रति पछुतो लाग्छ र गुमानेसँग माफी माग्छ । दुबैमा मेल हुन्छ र कथा समाप्त हुन्छ ।

अभ्यास 

छिमेकी लाइ किन जिउदको जन्ती मर्दा को मलामी हो भनिन्छ स-प्रस्नाग व्याख्या गर्नुहोस | 

Ctevt English. Condition Of Dalits In Nepal And Present Political Condition In Nepal (2023)/ letter to editor format .

  Do not copy only for Example.  

Q.      write a short description on the recent condition of dalits in nepal in about 300 words. 

Dalits, also known as “untouchables”, are considered as the lowest castes in the Nepalese society. Despite the efforts of the government to improve their status, the condition of dalits in Nepal remains concerning. They continue to face discrimination and poverty, and are denied basic rights and opportunities.

The recent years have seen some progress in terms of the integration of dalits into the mainstream society. The government has taken steps to provide education, healthcare and other services to the dalits. However, many of these initiatives have not been implemented effectively and the situation remains bleak for many.

The caste-based discrimination and violence against dalits is still prevalent in many areas. They are denied access to land, employment, and basic services like water and sanitation. This has resulted in poverty and low literacy rates among the dalits.

The government has also been slow in taking action against perpetrators of violence against dalits. This lack of action has led to a lack of trust in the justice system among the dalits, making them vulnerable to further abuse and exploitation

In conclusion, the condition of dalits in Nepal remains a major concern. Despite the efforts of the government to improve their status, they continue to face discrimination, poverty, and violence. Effective implementation of policies and programs aimed at improving their lives is essential to ensure a brighter future for the dalits in Nepal.

                     in very short 

In recent years, Dalits in Nepal have faced discrimination and unequal treatment in various areas such as education, employment, and access to services. Despite constitutional provisions and laws to protect their rights, enforcement remains weak and the caste-based discrimination persists. However, there have been some efforts to address the issue, such as activism by Dalit rights organizations and inclusion of Dalits in government programs.

In a 100 words 

write a short description on the recent condition of dalits in nepal in a 100 words 

Dalits, also known as "untouchables," are a marginalized community in Nepal and face widespread discrimination and social exclusion. Despite progress towards equality, they continue to face challenges in accessing education, healthcare, and employment opportunities. The government has implemented affirmative action policies to address these issues, but the implementation has been slow and inadequate. Furthermore, the traditional caste-based hierarchy remains deeply ingrained in Nepali society, perpetuating discrimination against Dalits. However, there have been some positive developments, such as the increase in Dalit representation in political offices and the growing awareness and advocacy by Dalit organizations.

write a letter  to your friend sharing in USA about present political  condition of Nepal 

FORMATE

Dear Suman Dahal  

USA,

17/10/2079

I hope this letter finds you in good health and spirits. It has been a while since we last spoke and I miss catching up with you. I am writing to share the current political situation in Nepal with you.

The country is undergoing a transition from a monarchy to a federal republic. The recent elections in 2022 resulted in the formation of a new government led by the CPN (Maoist-centre). The party has made significant progress in terms of fulfilling its promises, including the formation of new provinces and local bodies.

However, the government is facing challenges in implementing reforms in the education, health and legal sectors. There have been widespread protests and demonstrations against the slow progress of the government in these areas. Additionally, the issue of border disputes with India remains unresolved, causing tensions between the two countries

In conclusion, the current political situation in Nepal is complex and dynamic. The government is facing significant challenges in delivering results to the people, but at the same time, it is also making progress in certain areas. The future of the country remains uncertain, but I am hopeful that the government will rise to the challenge and lead the country towards a better future.

I hope this letter gives you an insight into the current political situation in Nepal. I would love to hear more about your life and how you are doing. Let’s catch up soon.

Warm regards,

Moti Yadav 

Q.   Write a letter to editor of kathmandu post about growing use of computer in daily life .

Ans. 

To, 

Dear Editor,

The Kathmandu Post. 

Kathmandu , Nepal 

2079/10/17 

Subject: The Growing Use of Computers in Daily Life

Dear Editor,

I am writing to express my thoughts on the growing use of computers in our daily lives. It is no secret that technology has drastically changed the way we live, work and communicate, and computers have played a significant role in this transformation.

Computers have become an integral part of our lives and are now used for various purposes, including education, entertainment, work, and communication. With the advancement of technology, computers have become more accessible and user-friendly, making it easier for people to integrate them into their daily routines.

One of the major advantages of using computers is their ability to simplify complex tasks and increase efficiency. However, the growing dependence on computers has also raised concerns about the potential negative impacts on our health, such as eye strain, back pain, and social isolation. It is important that we use computers in moderation and find a healthy balance between utilizing their benefits and avoiding their drawbacks.

In conclusion, the growing use of computers in our daily lives has brought about many positive changes, but it is also important to be mindful of their potential downsides. I believe that with proper education and awareness, we can continue to harness the power of technology for the betterment of society.

Sincerely,

Moti yadav 

Rupandehi,Nepal 

butwal 

moti.yadav.7330@gmail.com 

9867022149

Valentine’s Day worlds best wish of Valentine’s Day/ friendship / Husband / Wife /Girlfriend / Boyfriend/ poem

  Valentine’s Day 

Best 50 sms of valentine day  

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Valentine’s Day Wishes and Messages to my One And Only Man

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world best poem 

On this day of love, I wish for you

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To your heart, all the while

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Filling your life with happiness and grand

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With all my heart, this message I commend

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Filling your heart with love, so bright

And may every moment be filled with bliss

With a love that lasts, a kiss that's never missed

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That love will always come your way

May it fill your heart with happiness and peace

And bring you joy, with each moment release

On Valentine's Day, I send my love

With every thought, a gentle dove

May your heart be filled with love so bright

And your dreams come true, each and every night

May this Valentine's Day bring a smile

To your heart, all the while

And may love come your way, hand in hand

Filling your life with happiness and grand

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A life filled with joy, happiness and peace above

May your heart be filled with endless delight

And your days be blessed, with love so bright

On Valentine's Day, my love, I send

With all my heart, this message I commend

May your life be filled with love and happiness

And your dreams come true, with every success

May this Valentine's Day bring you delight

Filling your heart with love, so bright

And may every moment be filled with bliss

With a love that lasts, a kiss that's never missed