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Zoology Important Questions [Class 11th-English medium]

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Zoology is the study of animals, including their morphology, physiology, life history, habitats, behaviors, development and distribution. This blog will share with you a list of Zoology important Questions for Class 11th in English medium.

Zoology Important Questions class 10 english medium

Q1: Explain hierarchy of classification?

Ans: A hierarchy of classification is a system used to establish the relative importance or ranking of the members of a set or group, such as organisms, objects, events, or thoughts. The major classes of animals, which are vertebrate and invertebrate, are found at the top of the hierarchy because they have more members.

Q2: Define Species and it’s aspects

Species is the term used to describe a variety of different types of plants and animals. The word species can also be used to describe a group of organisms with similar traits.

For example, species of plants are different types of plants that have different traits that make them distinct from other types of plants. Species of animals are groups of animals that have different traits and make them distinct from other types of animals.”

Q3: What is Biodiversity Hotspot?

Ans: Biodiversity hotspot is a term that is typically used in conservation biology to refer to a geographic area that exhibits high levels of endemic species and endemism. It is usually used to describe the effect of human activity on biodiversity.

Q4: Define 3 types of Cartilages

Ans: Cartilage is a group of connective tissue that is made up of cells. Cartilage is flexible, resilient, and helps support the body.

There are three types of cartilages in zoology: hyaline, elastic and fibrous. Hyaline cartilage is the most common type of cartilage and is used for the joints. Elastin and fibrous cartilages are used for the bones.

Q5: What is Reproduction?

Ans: Reproduction is the act of creating new individual organisms, including eggs and sperm, through the process of sexual or asexual reproduction.

In animals, it can also be defined as the process by which new individual organisms are created from the cells of an existing individual organism.

In plants, vegetative reproduction is the process by which new individuals are created from existing ones by the replacement of their vegetative cells.

Q6: What is Binary Fission?

Ans: Binary fission is an important process in which a cell divides in half, creating two new cells. In most animals, this process is carried out by cells in the body, such as red blood cells or skin cells. The cells in the body that break down and recombine their DNA, creating two new cells, are called somatic cells.

For example, in the human body, somatic cells are responsible for creating new skin cells. This process, called binary fission, is the process by which somatic cells are created.

Q7: What is Ecosystem?

Ans: An ecosystem is a community of living organisms (plants, animals, microorganisms and their environment) in which every entity lives in a dynamic, interdependent relationship with every other entity.

It is a group of living things in which all the organisms live in a relationship with each other. This relationship is called the food chain. The food chain is made of producers, which is plants, and consumers, which is animals. The ecosystem includes the physical surroundings and the climate.

Q8: What is biological diversity?

Ans: Biological diversity is the variety of life on Earth, which includes the number of different species and their interactions. Biological diversity can be measured by the number of species, the number of individuals, the variety of populations of these groups.

Q9: What are the key characters of living organisms?

The key characters of living organisms in zoology are the classifications that they belong to. The key characters include the following: Nutrition, Respiration, Movement, Excretion, Growth, Reproduction and Sensitivity.

Q10: How did Aristotle classify the animals?

Ans: Aristotle was a Greek philosopher and student of Plato. Aristotle classified the animals into four groups: animals with blood, animals without blood, animals with blood circulation, and animals without blood circulation.

  • Aristotle believed that the soul of an animal was the same as the human soul.
  • Aristotle also thought that the soul consisted of reason, appetite, and spirit. From this, he believed that animals have the same emotions as humans, but they do not have the same intellect.
  • Aristotle believed that the world is made up of four elements: earth, water, fire, and air.
  • Aristotle believed that there are four Aristotelian elements found in all things: the principle of life, the principle of movement, the principle of thought, and the principle of rest.

Q11: What is cladistics?

Ans: Cladistics is a branch of biology that studies evolutionary relationships between organisms. It is based on the idea of common descent. Cladistics is often used in the field of paleontology where researchers study the evolutionary relationships between organisms and use the cladogram to study fossils. Cladistics may also be used in other fields of biology including evolutionary studies, plant and animal breeding, population genetics, molecular biology, and biogeography.

Q12: Define cladogram?

Ans: Cladograms are tree-like diagrams, which are used to show the branching of the evolutionary history of groups of organisms. Cladograms are based on the phylogenetic relationships between taxa. In cladograms, a clade is a monophyletic group of organisms that consists of a clade’s last common ancestor and all its descendants. Monophyletic groups cannot subdivide into other clades.

Q13: What happens to the constituents of blood immediately after a meal?

Ans: The constituents of blood are sugars, proteins, and water in the blood. Sugar is broken down into glucose and glucose is used by cells to release energy. Protein is broken down into amino acids and used by cells for various functions. Water is broken down into ions and used by cells to make the body function.

Q14: Define levels of Organization

Ans: Organisms who are considered to be the same level of organization are differentiated from one another by the complexity of their body plans. The level of organization in an organism is classified on the basis of the number of body segments, the number of body surfaces, and the number of body cavities. The following levels are identified as follows: Cells, tissue, organs, organ systems, and organisms.

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Q15: Name the layers of cells found in sponges?

Ans: The cells found in sponges are called the mesoglea, are composed of mesoglea and spongin, and are arranged in rings. They secrete a slimy, protective layer that surrounds the spongin. The spongin is the sponge’s single cell. The layers of cells found in sponges are the mesoglea, mesoglea, and spongin.

Q16: What is the tissue level of Organization?

Ans: The tissue level in zoology is the level of organization of a given group of organisms. The tissue level is also the level of organization of a given group of organisms in a hierarchy. This is typically measured by the number of cells that an organism has.

Q17: What are diploblastic animals?

Ans: The diploblastic condition is a type of metamorphosis which is characterized by the fusion of the two germ layers, the ectoderm and the endoderm, into a single layer. They have a head on one side of the body and a tail on the other, like a human. There are many different types of diploblastic animals. Some examples include sharks, eels, and octopuses.

Q18: What is meant by symmetry?

Ans: Symmetries are biological structures that have mirror images across their shape. They are important in understanding how evolution has shaped the anatomy of animals. This is most often seen in animals, with the exception of plants.

Animals have a head and a tail, for example, but the head and tail are the same length. These symmetries are necessary for survival because they help animals to hide from predators.

Q19: What is bilateral and Biradial symmetry?

Ans: Bilateral symmetry is when parts of an organism are mirror images of each other. In bilateral symmetry, the organism is left-right symmetrical, meaning that it has mirror-image left and right sides.

Biradial symmetry is when parts of an organism are mirror images of each other and are also left-right symmetrical. This is a more complicated type of symmetry because it is not just a mirror image of one side.

Q20: What is called coelomates?

Ans: Coelomates are a group of animal groups that include chordates, mollusks, arthropods, and annelids. This is a subset of the protostomes. Characteristics of coelomates include a fluid filled body cavity called a coelom, the presence of an anterior nerve cord, and a pseudocoelom.

Q21: What is notochord?

Ans: The notochord is an extension of the spine in vertebrates and is responsible for providing support. It is a flexible rod of cartilage that is found in the back of fish, amphibians, reptiles, birds, and mammals. In fish, the notochord is covered with a thin layer of bony plates called osteoderms. In amphibians, reptiles, and birds, the notochord is not covered by osteoderms and is covered with a thin layer of skin. In mammals, the notochord is covered with a thin layer of skin and a layer of fat and is called the notochordal sheath.

Q22: How the kingdom Animalia is classified broadly into sub-kingdoms?

Ans: The kingdom Animalia is classified broadly into sub-kingdoms of Eukaryota and Protista.

Eukaryota includes the animals which are eukaryotic and there are many different types of organisms that make up the kingdom.

Protista includes the organisms that are unicellular, which ranges from simple amoebas to the highly complex, such as Homo sapiens.

Q23: Write short notes about Ctenophora.

Ans: Ctenophora is the largest phylum of marine invertebrates and are generally known as comb jellies. These jellies have a translucent, gelatinous body and a soft, gelatinous, ribbon-like tail that they use to propel themselves through the water. They have an eight-segmented body that is divided into two sections. The first five segments are called the oral arm and the last three are called the aboral arm. The comb jelly is made up of a mass of smaller ctenophore cells that are joined together by a substance called connective tissue that holds them together and gives shape to their body. The comb jelly has an ectodermal (outer) layer and an endodermal (inner) layer. These two layers are separated by the jelly’s nervous system.

Q24: Define tissues and write their types

Ans: Tissues are a group of cells that are connected to each other to form a structure that performs a specific function. They are found in all living organisms and can be divided into two types: connective tissue and epithelial tissue.

Connective tissue is a group of cells that are tightly joined together and can be found throughout the body. They hold body organs together and provide support and protection to the body.

Epithelial tissue is the tissue that lines body surfaces such as the respiratory tract, digestive tract and urinary tract. These tissues form a barrier to prevent the passage of microorganisms, chemicals, and pathogens and are made up of cells that are closely packed together.

Q25: Why tissues are called living fabrics?

Ans: Tissues are called living fabrics because they are meant to be a living medium for the exchange and transport of materials. Tissues are made up of cells and a matrix and are closely related to tissues in the human body. They are the organs that perform most of the functions of the body, such as the digestive system, respiratory system, and the circulatory system. The main functions of tissues are to distribute oxygen, remove carbon dioxide, and provide a barrier against infection.

Q26: What is the modified columnar epithelium?

Ans: Modified columnar epithelium is the epithelium found in the respiratory tree of the lungs, which is modified in order to reduce the time that oxygen takes to travel through the tissue. This is achieved by the modification of the epithelial cells, which are found in the respiratory tree. The respiratory tree is the part of the respiratory system that is used to inhale and exhale.

This type of epithelium is found in the airway of the lungs and nose. Anatomically, modified columnar epithelium is also known as stratified squamous epithelium.

Q27: What are the types of exocrine glands? 

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Ans: There are many exocrine glands that are found in animals. There are two types of exocrine glands that are found in animals: endocrine glands and exocrine glands. Endocrine glands make hormones that control the way animals act and react. Exocrine glands make secretions that are necessary to maintain the body, such as saliva and tears.

Q28: What is the main function of compound epithelium?

Ans: Compound epithelium is a type of tissue that is found in the body’s outer layer, called the epidermis. This tissue separates the outer layer of skin from the inner layer, called the dermis. Compound epithelium is made up of various cells, including cells that produce keratin, which makes up the skin’s outer layer. This type of tissue also produces a lubricant called sebum, which keeps the skin moist and flexible.

Q29: What is cell junction? 

Ans: Cell junction is an important form of cell-to-cell contact in which the surfaces of one cell come in contact with the surfaces of other cells. The basic cell junctions are made up of a pair of extracellular matrix proteins, the cadherins, which are held together by other proteins and lipids.

Q30: What is muscle tissue? What is its main function?

Ans: Muscle tissue is a type of soft tissue that is found within the body. It is composed of cells that contract and relax, which allows movement. This tissue is composed mainly of fibers which are connected together by a loose connective tissue called tendons and ligaments, which provide support and protection.

One of the main functions of muscle tissue is to give strength and power to the body. Muscles are able to exert force in a variety of different ways, including through contraction, tension and shape-shifting ability. The shape-shifting ability involves changing the angles between the muscle fibers.

Q31: What is plaque? 

Ans: Plaque is a hard, yellowish-white deposit of bacteria and food particles that can form on the teeth. Plaque is not an infection, but it is a very common problem in the mouth. Plaque is the main cause of gingivitis, which is the most common form of gum disease, and tooth decay. Plaque is also the result of bacteria that live on the surface of teeth. These bacteria consume food particles, saliva, and other debris that collect on the teeth.

Q32: What is Digestion?

Digestion is the process of breaking down food for absorption into the bloodstream and for elimination from the body. It starts in the mouth where chewing and swallowing break down food into tiny pieces small enough to be swallowed. After the food leaves the mouth, it is mixed with saliva and moved to the stomach to be mixed with digestive enzymes. These enzymes help to break down the food further. After the food enters the stomach, it travels through the small intestine where the nutrients are absorbed into the bloodstream.

Q33: Name the types of Salivary glands

Saliva is the mixture of mucus, digestive enzymes and bacteria that is produced by the salivary glands and helps to moisten, digest and protect the teeth, oral mucosa and other surfaces of the mouth. The major salivary glands are the parotid and submandibular. The parotid gland is the largest and is seated anatomically in the facial region. The submandibular is the largest in the body, and can be found in the midline of the neck.

Q34: What is the role of HCl in the stomach?

Ans: The role of hydrochloric acid (HCl) in the stomach is to break down proteins and the food in the stomach. HCl is created by the parietal cells in the stomach. Hydrochloric acid is a primary digestive enzyme in the stomach.

Q35: Write a note on Egestion?

Ans: Egestion is the act of defecating or urinating, and is the massive expulsion of fecal matter or urine. It is a bodily function that is controlled by a complicated system of valves and muscles that releases feces or urine from the bowel or urinary bladder.

Q36: What is diarrhoea? Why diarrhoea is caused? What are its symptoms? 

Ans: Diarrhoea is a common disorder of the digestive system that is characterized by either the presence or absence of watery and/or bloody stools. It is an acute condition that affects the gastrointestinal tract.

Diarrhoea can be divided into two main types: acute diarrhoea and chronic diarrhoea. Acute diarrhoea can be caused by a number of factors such as food poisoning, a virus, bacterial infection, or parasites.

The most common cause of chronic diarrhoea is a long-term condition known as irritable bowel syndrome. This condition can be linked to the following: stress, food allergies, irritable bowel syndrome, and bacterial or parasitic infection. Diarrhoea typically lasts for a few days and is usually self-limiting, meaning that it goes away on its own after a few days and no long-term problems occur.

Q37: What is called Obesity?

Ans: Obesity is the accumulation of excess body fat that may lead to health problems. It is a disease that affects people of all ages, genders, and ethnicities. Obesity is not simply just an overweight person. It is a condition that can cause a number of health problems, including heart disease, diabetes, and even cancer. In order to prevent obesity, it is important to change your diet and exercise. If you are obese, it is important to try to maintain a healthy weight and to eat a balanced diet.

Q38: What is Indigestion?

Ans: Indigestion is the pain or discomfort that often comes from the stomach and intestinal tract. There are many different symptoms of indigestion, but it is mostly felt in the throat, chest, and abdomen. Sometimes, it can also feel like a burning sensation that comes from the stomach. Indigestion can be triggered by many different things, including eating too quickly, drinking alcohol, eating or drinking too much, eating fatty or spicy foods, and eating too close to bedtime.

Q39: Describe the structure of the liver?

Ans: The liver is a large organ in the body that is used for metabolizing and detoxifying the blood. It is located on the left side of the body, behind the heart and in front of the stomach. It is also located between the diaphragm and left kidney. It is a hollow organ that is made of special cells that work together to clear out toxins in the blood. The liver also contains many small blood vessels that help draw in oxygen and nutrients to help with its functions. The blood from the intestines is sent to the liver before it enters the heart area. The liver is made of lobules, which are small sections of the liver with a single capillary. The liver is also connected to the gallbladder, which stores bile made by the liver.

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Q40: How the stomach can accommodate a large meal?

Ans: There is a limit to how much food is able to be taken in by the stomach. If you have eaten a large meal, you will have to wait for a little bit for the stomach to finish digesting it. The stomach is able to digest food in three stages.

  • The first stage is the mechanical stage, which is the chewing and swallowing of the food.
  • The second stage is the chemical stage, which is where the food is broken down into its constituent nutrients.
  • The third stage is the metabolic stage, which is where the nutrients are absorbed.

The first two stages are completed within the first few minutes of eating. The metabolic stage can take several hours.

Q41: What is respiration?

Ans: Respiration is the process of breathing in and breathing out. It is one of the ways the body uses to get oxygen and the process of how the body takes in oxygen. Respiration is an important process for the body to live.

There are two types of respiration. These are inhalation and exhalation. Inhalation is when the air enters the body and exhalation is when the air leaves the body. There are three ways that the body uses to get oxygen. It can use the lungs, the skin, or the mouth. It also uses oxygen to cool the body core.

Q42: What are the characteristic features of the respiratory surface?

Ans: The respiratory surface is important because it helps the body remove toxins, maintain homeostasis, and regulate the pH of the blood.

  • The respiratory surface is made from layers of mucous membrane that are covered by epithelial and endothelial cells.
  • There is a thin layer of mucous membrane that lines the airway, and it is covered by a thin layer of epithelial cells.
  • The respiratory surface is important in that it helps to regulate the body’s pH because it is constantly producing a thin layer of mucus.

Q43: Write the steps involved in respiration?

Ans: The first step in respiration is breathing, which is when air enters the lungs and is transported to the rest of the body. The lungs are filled with air, and the chest expands to take in the new air. The ribs then expand to make room for the new air, and the lungs contract. This causes the air to move from the alveoli and into the bloodstream. The next step is the gaseous exchange, which is when oxygen and carbon dioxide are exchanged. The final step is the elimination of carbon dioxide.

Q44: What is ‘NRDS’?

Ans: Neonatal Respiratory Disease Syndrome (NODS) is a disorder that causes lungs to not grow properly and to not work properly. It is more than likely to occur in premature babies. In order to help your baby, you can give your baby formula instead of breast milk.

Q45: What is breathing? 

Ans: Breathing is the process of bringing in oxygen into the lungs and eliminating carbon dioxide. The average human breathes 12-16 breathes each minute. Breathing is a conscious function and can be voluntarily controlled. There are three phases of breathing: inhalation, exhalation and pause.

Q46: How the blood transports the oxygen to the tissues?

Ans: The blood transports oxygen to the tissues by transporting it through the lungs, which is then released into the blood. The blood then carries the oxygen to the rest of the body, where it is needed. The blood carries oxygen to the organs through the body’s circulatory system. Every organ has a specific amount of blood flowing through it.

Q47: How blood transports CO2 from the tissue cells?

Ans: Blood is only one of the bodily fluids that transport CO2. Blood can transport CO2 from the tissue cells to the lungs and then to the rest of the body. Blood flows through capillaries, which are very tiny and thin. There are many capillaries in one small square inch of tissue. CO2 is released into the blood, which takes it to the lungs. The lungs filter out CO2, which is then released into the atmosphere.

Q48: Write short notes on nitrogen narcosis

Ans: Nitrogen narcosis is the condition of nitrogen in the body becoming depressingly inert. This occurs when your lungs are exposed to the lack of oxygen at high pressure, which can occur in scuba diving. Nitrogen narcosis can make the diver feel light-headed and sometimes disoriented. This is caused by the nitrogen in the blood becoming inert, and your brain not getting enough oxygen.

Q49: What are the four main types of plasma proteins?

Ans: Plasma proteins are a large group of proteins secreted by an animal’s blood cells. They are composed of a multitude of molecules, and are responsible for vital functions within the body, such as transporting oxygen and fighting infections. There are four main types of plasma proteins are albumin, globulin, fibrinogen, and hemoglobin

Q50: What are platelets?

Ans: Platelets are a type of cell that are involved in blood clotting. They are also called thrombocytes and are found in the bone marrow, spleen, lymph nodes, and the blood. Platelets are also involved in blood coagulation, the process of forming a blood clot. These cells also produce serotonin, a substance important for many body functions, including mood.

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