RBSE Solutions Class 11 Biology Chapter 26 Zoology An Introduction

RBSE Class 11 Biology Chapter 26 Multiple Choice Objective Questions

Question 1. Paleontology deals with the study of
(1) Bones
(2) Primates
(3) Extincted animals
(4) Fossils
Answer: (4) Fossils
In simple words: Paleontology is a science that studies the remains of ancient life, like fossils. Fossils are the hardened traces of plants and animals from long ago, found in rocks.

🎯 Exam Tip: Remember that paleontology focuses on ancient life forms found as fossils, not just bones from living or recently deceased animals.

Question 2. Term "Biology” was propound by
(1) Darwin & Treviranus
(2) Lamarek & Treviranus
(3) Darwin & Wallace
(4) Lamarck & Darwin
Answer: (2) Lamarek & Treviranus
In simple words: The word "Biology," which is the study of life, was first suggested by scientists Lamarck and Treviranus. They used this term to describe the science of living things.

🎯 Exam Tip: It's important to associate key scientific terms with the scientists who coined them, as this often appears in objective questions.

Question 4. Study of interaction between animals & environment
(1) Ichthyology
(2) Ecology
(3) Paleontology
(4) Physiology
Answer: (2) Ecology
In simple words: Ecology is the scientific study of how living organisms, like animals, interact with each other and with their non-living surroundings. It helps us understand how nature works.

🎯 Exam Tip: Distinguish between different branches of biology; ecology specifically deals with organism-environment interactions and their consequences.

Question 5. Branch of zoology that deals with heredity
(1) Evolution
(2) Embryology
(3) Genetics
(4) Ecology
Answer: (3) Genetics
In simple words: Genetics is the part of zoology that focuses on heredity. Heredity is how traits and characteristics are passed down from parents to their offspring.

🎯 Exam Tip: Genetics is a core concept in biology; clearly understand its definition as the study of inheritance and variation.

Question 6. Who propounded "concept of species"
(1) John Ray
(2) M. Malpighi
(3) Darwin
(4) Lamarck
Answer: (1) John Ray
In simple words: John Ray was a scientist who first developed the idea of a "species." This concept helps us group similar living things together into distinct categories.

🎯 Exam Tip: Knowing the pioneers of biological concepts, like John Ray for species, is crucial for historical context in biology.

Question 7. Who is called as Father of medical science
(1) Aristotle
(2) Theophrastus
(3) Hippocrates
(4) Willium Harvey
Answer: (3) Hippocrates
In simple words: Hippocrates, an ancient Greek doctor, is widely known as the "Father of Medical Science." He greatly influenced how medicine is practiced and studied even today.

🎯 Exam Tip: Recognize key historical figures and their significant contributions to various scientific fields.

Question 8. Dr Lalji Singh contributed in the field of
(1) Ornithology
Answer: (3) Option text missing.
In simple words: Dr. Lalji Singh made significant contributions to the field of genetics, particularly in the area of DNA fingerprinting. His work helped in solving crimes and identifying individuals.

🎯 Exam Tip: When a question refers to a specific scientist, recall their primary area of contribution or a famous discovery associated with them.

Question 9. Who is called as Father of Modern Embryology?
(1) Darwin
(2) Mendel
(3) Morgan
(4) Von Baer
Answer: (4) Von Baer
In simple words: Karl Ernst von Baer is recognized as the "Father of Modern Embryology." He studied how embryos develop and made important discoveries about this process.

🎯 Exam Tip: Identify the specific contributions of scientists to particular branches of biology, such as Von Baer's role in embryology.

Question 10. Who make a Clone of sheep for the first time
(1) Ian Wilmut
(2) De Vries
(3) Darwin
(4) Lamark
Answer: (1) Ian Wilmut
In simple words: Ian Wilmut was a key scientist who led the team that successfully created the first cloned sheep, named Dolly. This was a very important scientific achievement.

🎯 Exam Tip: Modern biological breakthroughs and the scientists behind them are important topics; remember the famous Dolly sheep cloning project and its leader.

RBSE Class 11 Biology Chapter 26 Very Short Answer Questions

Question 1. Name the book written by Aristotle.
Answer: The book written by Aristotle is called "Historia Animalium." This book was a major work that described the anatomy and habits of many animals. It showed his deep observations of the natural world.
In simple words: Aristotle wrote a book called "Historia Animalium."

🎯 Exam Tip: When asked for specific titles or names, ensure accurate spelling and capitalization for full marks.

Question 3. Name the Father of modern embryology.
Answer: The Father of modern embryology is Karl Ernst von Baer. He performed groundbreaking studies on the development of various animal embryos, laying the foundation for this field. His work greatly advanced our understanding of how living beings form.
In simple words: Karl Ernst von Baer is known as the Father of modern embryology.

🎯 Exam Tip: For "Father of..." questions, remember the full name and the specific field they pioneered.

Question 4. Paleontology deals with the study of?
Answer: Paleontology is the scientific study of fossils. Fossils are the remains or impressions of prehistoric life preserved in rock, offering clues about ancient environments and organisms. This field helps us understand Earth's history through its past life forms.
In simple words: Paleontology studies fossils.

🎯 Exam Tip: Define paleontology precisely by linking it to the study of fossils and prehistoric life.

Question 5. Which branch deals with the study of improvement of human race?
Answer: The branch that deals with the study of the improvement of the human race is called Eugenics. This field historically aimed to improve human genetic qualities, though its practices have been controversial. It focused on traits that could be inherited.
In simple words: Eugenics is the branch that studies how to improve the human race.

🎯 Exam Tip: While defining eugenics, mention its controversial aspects briefly to show a complete understanding.

RBSE Class 11 Biology Chapter 26 Short Answer Questions

Question 1. Define Taxonomy.
Answer: Taxonomy is the scientific study of classifying and naming living organisms, especially animals. It involves arranging animals into groups based on their shared characteristics and giving them proper scientific names. This systematic approach helps scientists organize and understand the diversity of life on Earth.
In simple words: Taxonomy is the study of how animals are classified and named in an organized way.

🎯 Exam Tip: When defining taxonomy, ensure you mention both "classification" and "nomenclature" (naming) as key components.

Question 2. Who rediscovered the discovery of Mendel?
Answer: Mendel's laws of inheritance, which were initially overlooked, were later rediscovered by three scientists: Hugo De Vries, Carl Correns, and Erich von Tschermak in 1900. These researchers independently found Mendel's work and brought it to light, making it a cornerstone of genetics. Their rediscovery confirmed the fundamental principles of heredity.
In simple words: Hugo De Vries, Carl Correns, and Erich von Tschermak rediscovered Mendel's laws in 1900.

🎯 Exam Tip: Remember the names of all three scientists who independently rediscovered Mendel's work, as questions often ask for multiple contributors.

Question 3. Differentiate pure & applied zoology.
Answer: Pure zoology focuses on understanding fundamental biological principles, such as animal behavior, evolution, and classification, without immediate practical application. For example, studying the mating rituals of a specific bird species falls under pure zoology. Applied zoology, on the other hand, uses zoological knowledge to solve practical problems for human welfare, like pest control, wildlife conservation, or animal breeding. For instance, developing vaccines from animal antibodies is an application of zoology. Both branches are crucial for advancing our overall knowledge and its benefits.
In simple words: Pure zoology studies animals just to gain knowledge, while applied zoology uses that knowledge to help humans or solve problems.

🎯 Exam Tip: Clearly distinguish between the 'why' (pure science for knowledge) and the 'how' (applied science for practical use) in your differentiation.

Question 4. Name any four Zoologists worked after 16th century.
Answer: Four zoologists who worked after the 16th century include Lamarck, Von Baer, Charles Darwin, and G.J. Mendel. These scientists made significant contributions to various fields like evolution, embryology, and genetics, shaping modern biology. Their discoveries transformed our understanding of life.
In simple words: Some important zoologists after the 16th century were Lamarck, Von Baer, Charles Darwin, and G.J. Mendel.

🎯 Exam Tip: When listing multiple names, ensure you have at least the requested number and that they are historically accurate for the given period.

Question 5. Explain the importance of Zoology in human welfare
Answer: Zoology is very important for human welfare in many ways. It helps us understand human health by studying animal anatomy and physiology, which can lead to treatments for diseases. For instance, understanding mosquitoes helps control malaria. It is also crucial for agriculture and livestock breeding, improving food production and animal care. Additionally, zoology helps in industrial growth, providing animal products like leather and silk. It aids in conserving endangered animal species and helps prevent superstitions by providing scientific understanding of animals. Finally, it helps maintain environmental balance by studying how animals interact with their surroundings.
In simple words: Zoology helps humans in health, farming, industries, protecting animals, and keeping nature balanced.

🎯 Exam Tip: Support your explanation of zoology's importance with diverse examples from different fields like health, agriculture, and conservation.

RBSE Class 11 Biology Chapter 26 Essay Type Questions

Question 1. Write the names & definition of various branches of zoology
Answer: Modern zoology has been greatly enriched by advanced research techniques, including electron microscopy. Here are some of its main branches:
1. Taxonomy – This is the systematic study of animals, focusing on their classification and naming. It organizes living organisms into structured groups.
2. Morphology – This branch studies the external features and size of animals. It looks at the outward appearance of different creatures.
3. Anatomy – This deals with the internal structure of animals. The study of tissues within animals is known as histology, a part of anatomy.
4. Genetics – This branch studies how characteristics (genes) are passed from one generation to the next. It explains heredity and variation.
5. Physiology – This involves studying how the organs and organ systems of an animal's body function. Examples include the physiology of digestion or respiration.
6. Embryology – This is the study of embryonic development, which means how a young organism forms from a zygote (fertilized egg). This helps understand growth before birth.
7. Evolution – This branch explores the origin of life, the development of different species, and how they have changed over time. It explains the diversity of life.
8. Ecology – This studies how animals interact with each other and their environment. It helps us understand ecosystems and conservation.
9. Eugenics – This is the study focused on improving the human race through genetics. The term was first used by Sir Francis Galton. This branch explores hereditary improvements in humans.
In simple words: Zoology has many branches like Taxonomy (classifying animals), Morphology (external features), Anatomy (internal structure), Genetics (heredity), Physiology (body functions), Embryology (development), Evolution (origin of life), Ecology (animal-environment interaction), and Eugenics (human race improvement).

🎯 Exam Tip: For each branch, provide a concise definition and, if possible, a brief example to illustrate its focus.

Question 2. Describe in brief the history of Zoology.
Answer: The history of zoology shows that humans have interacted with animals for a very long time. This is clear from animal drawings found in ancient caves and on old pottery. Ancient Hindu scriptures like the Vedas (around 2500 BC), Ramayana (1900 BC), and Mahabharata (1400 BC) also describe animals in detail. For example, the Ramayana mentions golden deer and vultures, while Hindu gods often have animals as their vehicles, like a rat for Ganesha or a lion for Maa Kali. This highlights the early knowledge and importance of animals in human culture.

In ancient Indian medical texts called Chikitsagranth and Ayurveda, organisms were grouped into four categories based on how they originated: from a womb, from eggs, from heat and moisture, or from seeds. A notable Indian healer, Sushruta, wrote the "Sushrut Samhita" (before 6th century BC), which included information on medicinal plants and procedures using animal and mineral sources. Even in the Ramayana, the medicinal plant "Sanjivani" was used to treat Laxman.

Many old Greek thinkers also shared knowledge about animals. Hippocrates (460-370 BC), known as the Father of Medical Science, wrote the first articles on human diseases. Aristotle (384-322 BC), often called the Father of Zoology and Embryology, wrote "Historia Animalia," detailing the structure, habits, and classification of 500 animals. He was also the first to study how chicks develop in eggs. These early observations were crucial for building a foundation of biological knowledge.

Later, William Harvey (1578-1655) studied the blood circulation system. Z. Janssen (1540) made the first compound microscope, and M. Malpighi (1628-1994) did microscopic studies on blood, tissues, and chick embryology, also discovering the malpighian capsule in kidneys. He is known as the Father of Microscopical Anatomy. John Ray (1627-1705) classified insects, reptiles, and cattle, and he introduced the "Biological concept of species." Antony Van Leeuwenhoek (1632-1723) studied sperms, blood cells, muscles, and protozoans, earning him the title Father of Microbiology.

Leonardo da Vinci (1690) studied fossils and is called the Father of Paleontology. Cuvier (1769-1832) helped establish comparative anatomy and paleontology. Lamarck (1744-1829) studied the "inheritance of acquired characters" and wrote "Philosophic Zoologique." Karl Ernst von Baer (1792-1876) studied comparative embryology and is known as the Father of Modern Embryology. Charles Darwin (1809-1882) formulated the "Theory of Natural Selection" and wrote "Origin of Species," a book that became very influential.

Gregor John Mendel (1822-1884) studied hereditary characters, and his work, known as Mendelism, led to him being called the Father of Genetics. Hugo De Vries (1902) proposed the mutation theory. T.H. Morgan (1933) established the Chromosome theory of Heredity, showing that genes are linked on chromosomes, earning him a Nobel Prize. A.I. Oparin (1957-1968) suggested an experimental theory about the origin of life on Earth. These scientists all built upon earlier knowledge, constantly advancing our understanding of living organisms.
In simple words: The history of zoology started with ancient human observations of animals, seen in cave drawings and old texts. Early thinkers like Aristotle and Hippocrates wrote important books and made key observations. Later, scientists like Harvey, Malpighi, Ray, Leeuwenhoek, Darwin, Mendel, and others made huge discoveries in fields like circulation, microscopy, evolution, and genetics, slowly building up our knowledge of animals over centuries.

🎯 Exam Tip: When describing the history, organize it chronologically or by key periods (ancient, medieval, modern) and highlight the major contributors and their specific discoveries.

Question 3. What is importance of study of Zoology?
Answer: The study of zoology is very important for human welfare, contributing to various essential areas:
1. Human Health: Zoology helps us understand the anatomy and physiology of different body organs. It also helps in protecting humans from parasites by studying their habits and structures. For instance, knowing about the Anopheles mosquito and the Plasmodium parasite helps control malaria. It also aids in understanding and preventing diseases like amoebiasis, kala-azar, sleeping sickness, and various bacterial and viral illnesses.
2. Agricultural Importance: Zoology helps us study animals that are beneficial or harmful to agriculture. Earthworms, for example, make soil fertile and are known as "friends of farmers." Many insects help in pollinating crops. Studying pests helps protect crops from diseases. This knowledge improves crop yields and reduces losses.
3. Importance in Industrial Development: Many animal products are used in industries, both small and large. These include items like leather, pearls, lac, silk, sponges, horns, feathers, and mollusk shells. Industries like pisciculture (fish farming), poultry (raising chickens), sericulture (silk farming), and apiculture (beekeeping) rely on zoological knowledge for their development, providing detailed information about the animals involved.
4. Conservation of Animals: Zoology helps in protecting endangered animal species that are close to extinction. By studying these animals, we can create wildlife sanctuaries and national parks to ensure their survival and maintain biodiversity.
5. Environmental Balance: Zoology helps us understand how living systems (biotic) interact with non-living environmental factors (abiotic). Animals work together with their environment to survive better, and zoology helps us learn about these important connections. This understanding is vital for a healthy planet.
6. Superstition Prevention: Zoological studies can help to remove many superstitions related to animals that exist in society. By providing scientific facts, these studies help to eliminate false beliefs about animals among people.
In simple words: Zoology is crucial for human well-being by improving human health, boosting agriculture, supporting industries through animal products, protecting endangered species, maintaining environmental balance, and debunking animal-related superstitions.

🎯 Exam Tip: Provide clear, distinct points for each area of importance and include specific examples where possible to strengthen your answer.