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Given below are a set of few questions and their answers from our question bank of Important Questions Class 8 Science Chapter 9. Students after solving these questions will also get to revise the entire chapter.
Question 1. Sets of reproductive terms are given below. Choose the set that has an incorrect combination.
Reproduction is a process in which organisms make more organisms similar to themselves. Millions of these sperm are in this small amount of semen, and they swim up from the vagina through the cervix following the uterus to meet the egg present in the fallopian tube. It takes sperm to fertilise the egg.
Question 2. Explain the embryo’s future development after it gets embedded in the uterus.
The developing embryo gets embedded in the uterus wall for further development. The embryo continues to develop inside the uterus. It eventually develops body parts such as hands, legs, eyes, head, ears etc. The stage of an embryo in which all the parts of the body can be identified is known as a foetus. When the development of the foetus is completed, the mother gives birth to the baby.
Question 3. How is reproduction in hydra different from that in Amoeba?
Amoeba is a unicellular organism that can change its shape. It is generally found in water bodies like ponds, lakes and slow-moving rivers.
Binary fission in Amoeba
Budding in Hydra
Question 4. Define asexual reproduction. Explain one method of asexual reproduction in animals.
The continuity of generation in society is a common process. Everyone wants to see the next generation. This process is termed reproduction. The process through which organisms give birth to young, new organisms of the same kind is known as reproduction. There are two main types of reproduction. Sexual and asexual are two types of reproduction. This article will read about asexual reproduction.
Asexual reproduction is the mode of reproduction involved in producing offspring by a single parent. Asexual reproduction is the mode of reproduction in which a single parent produces new offspring. The new individuals produced are physically and genetically identical to each other.
The following are the important features of asexual reproduction:
Types of asexual reproduction
There are various types of asexual reproduction:
Binary fission
The term “fission” indicates “to divide”. Through binary fission, the parent cell gets divided into two cells. The cell division patterns vary in various organisms, i.e., some are directional while others are non-directional.
Example: Amoeba and euglena show binary fission.
It is one of the most simplest and uncomplicated methods of asexual reproduction. The parent cell gets divided into two, each daughter cell containing a nucleus of its own that is genetically identical to its parent. The cytoplasm also takes part in division, leading to two equal-sized genetically identical daughter cells. The process repeats itself, and these daughter cells grow and further divide.
Question 5. The hen is odd in the list of animals given below. (human beings, cows, dogs, hens). The reason for it is
Here, the hen is the odd one out because it is oviparous, i.e. it lays an egg from which young ones are hatched later. Viviparous animals undergo internal fertilisation, and the embryo develops inside the mother until a young one is born. The ovoviviparous animals produce eggs, but the eggs develop inside the mother, and a live organism is born. However, unlike viviparous animals, ovoviviparous animals do not have a placenta. Ovoviviparous animals are born alive.
Question 6. Although two cells called gametes fuse, the product formed is a single cell called the zygote. Justify.
During the process of fertilisation, the sperm gets fused with the egg cell. The content of the sperm cell gets transferred into the egg to form the zygote. Hence, the product formed is a single-celled zygote. A zygote is the first diploid cell formed by the fusion of female and male gametes resulting in the formation of an embryo.
The zygote rapidly divides in the initial 12-24 hours of formation.
The cell mass forms a hollow ball during the process of blastulation.
Cells start differentiating and forming cavities.
The three germ layers form during gastrulation.
Formation of primitive streak is followed by notochord formation
Tubes get formed, making a neurula.
The notochord forms into the neural plate.
The neural plate folds to form a neural tube and crest.
The mesoderm gets divided into axial, paraxial, intermediate and lateral plate mesoderm, which gives rise to different organs.
Question 7. Why do only male gametes have a tail?
Male gametes or sperms are motile. The tail of the sperm helps the sperm swim through the female’s reproductive tract to reach the oviduct. The male gametes, i.e., sperms, are produced within the male reproductive system. Sperms are small unicellular structures with a head, middle piece, and tail.
Question 8. How can we say that fish exhibit external fertilisation?
External fertilisation in fish:
Question 9. In which female reproductive organ does the embryo get embedded?
The embryo gets embedded in the uterus of the female reproductive system. The female reproductive organ is where the embryo gets embedded in the uterus wall. It is here that the embryo continues its development.
Question 10. What is the uterus?
The uterus is a hollow muscular structure seen in the pelvic region of females between the rectum and the bladder. The uterus’s main function is to nourish the developing foetus until birth.
Over the gestation period which is 9 months in humans, the embryo develops its body parts such as hands, ears, eyes, nose, legs, etc. There is an embryonic stage wherein all body parts can be distinguished, and the embryo has then termed the foetus.
Question 11. Aquatic animals where fertilisation occurs in water are said to be:
Fertilisation that occurs on the outside of the body of an organism is known as external fertilisation. It normally requires a water body for successful fertilisation.
The female releases its eggs in the water. The male also releases the sperm in the water for fertilising them. The larval life of frogs is in water, whereas the adult life is on land.
Question 12. The eggs of frogs do not have shells for protection, yet they are safe in the water. How?
Answer 12.
Frog’s eggs are present without any external covering or shell, but a layer of jelly holds the eggs together, thus providing them protection. This jelly or thick covering also protects them from drying up and prevents them from being eaten by other predators or animals.
Question 13. Hens and frogs are both oviparous exhibiting different types of fertilisation. Explain.
Hens are oviparous in nature, in which internal fertilisation takes place. The fertilised egg develops into an embryo inside the body. Frogs are oviparous, in which fertilisation and development of zygote to the embryo and young ones occur outside the body.
Question 14. The term metamorphosis is not used while describing human development. Why?
In human beings, the body parts of an adult are present from the time of birth. In the metamorphosis process, the parts of the adult are different from those at the time of birth. Metamorphosis does not occur in humans and other viviparous animals because their offspring are entirely formed inside their mother’s womb. They do not require any further differentiation of their body parts. However, the body parts grow and develop to reach maturity after birth.
Question 15. Explain the importance of reproduction in living organisms.
Reproduction is the process of producing or giving birth to an offspring. There are generally two forms of reproduction – Asexual and sexual reproduction.
Here are some points highlighting the importance of reproducing in living organisms:
Question 16. Which of the following statements about reproduction in humans is correct?
The female reproductive system is framed in such a way to perform different functions. It makes egg cells that are essential for reproduction, called ova. The system is organised for delivering the ova to the region of fertilisation. The egg fertilisation takes place in the fallopian tubes along with the sperm. Implanting in the uterus’s walls and initiating the pregnancy stages is the next step for fertilised eggs. Once sperm enter the vagina, they can move through the cervix, into the uterus, and to the end of a fallopian tube. If sperm can fuse with an egg, fertilisation takes place.
Question 17. A mother gives birth to a baby, but the baby has the characteristics of both parents. How is this possible?
Though the mother gives rise to a baby, fertilisation involves the fusion of gametes from both parents. Hence, the character is obtained by both parents. The zygote, therefore, has both father’s and mother’s contributions. Since the zygote develops into the baby, it has the characteristics of both parents.
Question 18. In markets, birds’ eggs are available but never dogs’ eggs. Why?
Dogs are viviparous. Dogs do not lay eggs, and it gives birth to puppies. Hence, dog eggs are not available in the market. Birds lay their eggs, Birds are oviparous, hence, their eggs are easily available in the market,
Question 19. What is metamorphosis? Give examples.
In many living species, the young one or the offspring does not resemble the adult. This is known as indirect development and such a young one is known as a larva or nymph. The process of changing from a nymph or larva to an adult body is known as metamorphosis. This transformation of a larva or nymph into an adult is characterised by a series of morphological, behavioural and physiological changes.
Examples include frogs, butterflies, etc.
Question 20. Differentiate between internal fertilisation and external fertilisation.
Fertilisation is generally defined as the fusion of a male and a female gamete.
Internal fertilisation occurs inside the female body.
There are higher chances of survival of the offspring.
Internal fertilisation protects fertilised eggs or embryos from harsh environments.
Examples are cows, humans, dogs, monkeys, etc.
External fertilisation
It occurs on the outside of the female body.
There are low chances of survival of the offspring.
Most aquatic animals use this type of fertilisation, and the advantage of external fertilisation is that it produces many offspring due to external hazards. Examples are fish, frogs, organisms etc.
Question 21. Reproduction by budding takes place in
Reproduction in all the given organisms takes place through asexual methods. Hydra reproduces by forming buds on its body surface, which develops into a new organism. Amoeba, paramecium and bacteria multiply by dividing themselves into two parts, i.e. by binary fission method. Budding is an asexual mode of producing new organisms. In this process, an organism is developed from a small part of the parent’s body.
Students must first read through the entire chapter to understand the new themes presented in the chapter. It also helps to identify the crucial concepts necessary from an examination point of view.
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Q.1 Solid sodium chloride does not conduct electricity while molten sodium chloride conducts. Explain why?
Marks: 2 Ans
Solid sodium chloride does not conduct electricity because the particles (ions) are held together by strong forces of electrostatic attraction. In molten state the ions become free and move to conduct electricity, since on heating the bonds between ions become weak.
Q.2 Why is an acid or an ionic salt added to water in the electrolysis of water?
Pure water or distilled water is a bad conductor of electricity whereas acids and bases are good conductors of electricity. When an acid or ionic salts are dissolved in distilled water then the resulting solution conducts electricity.
Q.3 Define electrolysis.
Marks: 1 Ans
Cbse class 8 science important questions, chapter 1 - crop production and management.
Chapter 3 - synthetic fibres and plastics, chapter 4 - materials : metals and non-metals, chapter 5 - coal and petroleum, chapter 6 - combustion and flame, chapter 7 - conservation of plants and animals, chapter 8 - cell - structure and functions, chapter 10 - reaching the age of adolescence, chapter 11 - force and pressure, chapter 12 - friction, chapter 13 - sound, chapter 14 - chemical effects of electric current, chapter 15 - some natural phenomena, chapter 16 - light, chapter 17 - stars and the solar system, chapter 18 - pollution of air and water, faqs (frequently asked questions), 1. apart from the ncert textbook, where can i find good study resources for class 8 science.
You can find the important study materials for Class 8 Science on the Extramarks official website. Our study materials cover all important topics from sources like NCERT textbooks, NCERT exemplar and other reference sources related to the CBSE curriculum. You can build your confidence and improve your scores by practising and revising from our study resources. The important questions and their solutions will help you to clarify your concepts which will come handy while answering difficult questions in the exams..
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Many important chapters that form the base of Class 9 and Class 10 Science are covered in CBSE Class 8 Science syllabus. Here is a complete list of these eighteen chapters:
Chapter 18 Pollution of Air and Water
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NCERT Solutions for Class 8 Science Chapter 6 delves into the fascinating world of how animals reproduce. From tiny insects to large mammals, reproduction is essential for species' survival. This Chapter explores the various methods animals use to reproduce, from simple processes like budding and fission to more complex ones like sexual reproduction. Through easy-to-understand explanations and examples, Class 8 Reproduction In Animals helps students learn about the different reproductive organs and cycles in animals. Class 8 Science Chapter 6 PDF helps students thoroughly understand the main concepts presented in the curriculum.
Download the FREE PDF of Reproduction In Animals Class 8 Questions And Answers These NCERT Solutions are prepared by the Vedantu Experts and are updated according to the Class 8 Science syllabus . Start with Vedantu to pursue a path of academic excellence!
Class 8 Science Reproduction In Animals covers various reproductive methods observed in the animal kingdom, including asexual and sexual reproduction.
Class 8 Science Chapter 6 Question Answer helps students learn about the structural adaptations of different animals for reproduction, such as the reproductive organs and their functions.
Through examples and diagrams, learners gain insights into the lifecycle of various animals.
Reproduction In Animals Class 8 PDF delves into the process of sexual reproduction, explaining the roles of male and female reproductive organs and fertilisation.
The concepts covered in this chapter are crucial for academic learning and offer insights into real-world phenomena and the diversity of life on Earth.
By engaging with NCERT Solutions for Reproduction In Animals Class 8, students can develop a deeper appreciation for the mechanisms through which life is sustained and propagated in the animal world.
1. Explain the importance of reproduction in organisms.
Ans: Importance of reproduction:
Human reproduction is essential for the continuance of the human species.
It is the process of producing new individuals from the living organisms.
Reproduction ensures the passage of traits and habitats from generation to generation.
Without reproduction the species will be vanished from the earth and there is no world without species.
2. Describe the process of fertilization in human beings.
Ans: Process of fertilization in human beings:
Human reproduction is brought about by formation and fusion of the male and female gametes. The male gametes, i.e. the sperms are produced by the testis and the female gametes, i.e. the ovum is produced by the ovary.
During copulation, the male releases sperm into the female reproductive tract. Since the sperm is a motile gamete, it will swim up the female reproductive tract to reach the ovum in the fallopian tube.
The process of fertilization happens when the male and female gametes fuse together in the fallopian tube. The end product of fertilization is called a zygote, which will develop further and become a foetus in the womb.
3. Choose the most appropriate answer.
a. Internal fertilisation occurs
In the female body.
Outside female body.
In male body.
Outside male body
Ans:
I. In a female body
Internal fertilization takes place inside the female body and external fertilization takes place outside the female body.
b. A tadpole develops into an adult frog by the process of
Fertilisation.
Metamorphosis
Embedding
Budding
Ans: (II) Metamorphosis
Fertilization takes place in human beings by the fusion of gametes and budding is a type of asexual reproduction takes place in parents in forming the buds.
c. The number of nuclei present in a zygote is
Ans: (II) one
Only one nuclei is present in a zygote.
4. Indicate whether the following statements are true (T) or false (F).
Oviparous animals give birth to young one.
Oviparous animals lay eggs and the young ones develop inside it.
Each sperm is a single cell.
Ans: T
External fertilisation takes place in frogs.
A new human individual develops from a cell called gamete.
Egg laid after fertilisation is made up of a single cell.
Amoeba reproduces by budding.
Amoeba reproduces asexually through binary fission.
Fertilisation is necessary even in asexual reproduction.
Binary fission is a method of asexual reproduction.
A zygote is formed as a result of fertilisation.
An embryo is made up of a single cell.
Embryo is a multicellular structure.
4. Give two differences between a zygote and Foetus.
Ans: Difference between zygote and foetus:
Zygote | Foetus |
Zygote is the single cell resulting from fusion of ovum and sperm. | Foetus is the much-developed form of zygote which has body parts and body organs. |
It is generally observed in the fallopian tube of the female | The foetus is a much-developed version of a baby present in the uterus. |
5. Define asexual reproduction. Describe two methods of asexual reproduction in animals.
Ans: Asexual Reproduction:
It is a mode of reproduction that does not entails the union of sex cells or gametes.
There are different types of asexual reproduction, they are binary fission, budding vegetative propagation, spore formation, fragmentation. There is no gamete formation in this type of reproduction. Animals like Hydra, Amoeba undergo asexual mode of reproduction.
Two types of Asexual reproduction are:
Budding: It is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site. These buds develop into tiny individuals and when fully they mature and detach from the parets body and become a new independent individual. Example: Hydra.
Binary Fission: In this type of asexual reproduction the body of the organism mainly unicellular organism divides into two. Each of the two daughter cells are alike. Example: Amoeba.
6. In which female reproductive organ does the embryo get embedded?
Ans: The embryo gets embedded in the wall of the uterus for further development.
7. What is metamorphosis? Give examples.
Ans: Metamorphosis:
It means sudden change which happens while developing.
The animals that undergoes metamorphosis are
Butterfly (egg🡪larva🡪pupa🡪adult)
Frog (egg🡪tadpole🡪adult)
8. Difference between internal fertilisation and external fertilisation.
Ans: Difference between internal fertilization and external fertilization:
Internal Fertilisation | External Fertilisation |
The fertilisation takes place inside the female body. Union of male and female gametes occur in the female body after copulation. Example- human beings, reptiles, birds. | The fertilisation takes place outside the body of the female. Union of male and female gametes occur outside the female body. Example- frog, fish and some of the algae etc. |
9. Complete the crossword puzzle using the hints given below. Across
1. The process of the fusion of the zygotes.
6. The type of fertilisation in hen.
7. Term used for bulges observed on the sides of the body of hydra.
8. Eggs are produced here.
2. Sperms are produced in these male reproductive organs.
3. Another term for the fertilized egg.
4. These animals lay eggs.
5. A type of fission in amoeba.
1. The process of the fusion of the zygotes - FERTILIZATION
6. The type of fertilisation in hen - INTERNAL
7. Term used for bulges observed on the sides of the body of hydra - BUDS
8. Eggs are produced here - OVARY
2. Sperms are produced in these male reproductive organs - TESTES
3. Another term for the fertilized egg - ZYGOTE
4. These animals lay eggs - OVIPAROUS
5. A type of fission in amoeba – BINARY
S. No | Topics of Reproduction in Animals Class 8 | |
1. | Modes of Reproduction | |
2. | Sexual Reproduction | |
3. | Asexual Reproduction |
Types of Reproduction:
Asexual Reproduction: Involves one parent; offspring are genetically identical to the parent. Methods include budding, fission, regeneration, and fragmentation.
Sexual Reproduction: Involves the fusion of male and female gametes (sperm and egg) to form a zygote, leading to genetic variation.
Male Reproductive System:
Organs: Testes, vas deferens, penis.
Function: Testes produce sperm, which is transported through the vas deferens and released through the penis.
Female Reproductive System:
Organs: Ovaries, fallopian tubes, uterus, vagina.
Function: Ovaries produce eggs; fertilisation occurs in the fallopian tubes, and the fertilised egg implants in the uterus.
Fertilisation:
Process: Sperm fuses with an egg to form a zygote, usually in the female reproductive tract.
Viviparous Animals:
Give birth to live young.
Examples: Humans, dogs, whales.
Oviparous Animals:
Lay eggs that hatch into offspring.
Examples: Birds, reptiles, amphibians, and most fish.
Vedantu’s Class 8 Science Reproduction In Animals Question Answer comprehensively explains each topic in Chapter 6, ensuring a thorough understanding of animal reproduction concepts.
Reproduction In Animals Class 8 PDF follows a structured approach, breaking down complex topics like types of reproduction.
The topics like the reproductive systems of animals, fertilisation, and life cycle into small sections, making it easier for students to grasp the content.
Concepts are explained in a clear and simple language, making it accessible for students of all learning levels.
Class 8 Science Reproduction In Animals includes diagrams, illustrations, and charts to help visual learners understand complex concepts more easily.
Class 8 Reproduction In Animals Question Answer helps students learn about the structural adaptations of different animals for reproduction, such as the reproductive organs and their functions.
Vedantu offers supplementary resources such as video lectures, quizzes, and study materials to complement the chapter solutions, providing a holistic learning experience.
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Vedantu’s NCERT Solutions for Class 8 Science Chapter 6: Reproduction in Animals is an excellent resource for understanding key concepts like modes of reproduction, fertilisation, and development of embryos. Students should focus on these areas to grasp the essentials of animal reproduction. The solutions simplify complex topics, making them easy to understand and apply. Additionally, practice is crucial as the previous year's question papers often include around 10 questions from this chapter. By studying these solutions, students can confidently prepare for exams and improve their understanding of the subject.
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1. Explain the difference between a Zygote and a Foetus?
The difference between a zygote and a foetus is
Zygote– Zygote is the first stage of development. It is developed by the fusion of male and female gametes. It is a single cell. The zygote is divided to form an embryo. It lasts for a few weeks and then develops into the next stage.
Foetus– Foetus is the last stage of the development of an organism. Foetus usually undergoes an internal development. The stage of an embryo that shows all the main body parts of a mature organism.
2. Explain two methods of Asexual reproduction in animals?
The two modes of asexual reproduction are:
Binary Fission in Amoeba– It is asexual reproduction in which one cell is divided into two equal parts. It is a unicellular organism that consists of a cell membrane, cell wall and cytoplasm. In this process, the nucleus of amoeba is first divided into two parts to form daughter nuclei.
Budding in Hydra– Organisms like hydra use regenerative cells for reproduction by the process of budding. The first step in this process is the formation of buds and then it develops as a small outgrowth on the parent’s body. As the bud develops, it receives the characteristics of the parent organism.
3. List out the important topics covered in NCERT Solutions for Chapter 6 of Class 8 Science?
The following topics have been covered in NCERT Solutions for Chapter 6 of Class 8 Science:
Modes of Reproduction (Sexual and Asexual)
Male and Female Reproductive Organs
Fertilization
Development of an Embryo
Viviparous and Oviparous animals
Asexual Reproduction (Budding and Binary Fission)
With the help of NCERT Solutions, you will learn all about these concepts so that acing your exams becomes a cakewalk.
4. What is the advantage of using the NCERT Solutions for Chapter 6 of Class 8 Science provided by Vedantu?
NCERT Solutions for Chapter 6 of Class 8 Science provided by Vedantu are the best choice to understand the Chapter ‘Reproduction in Animals’. The experts curate these solutions at Vedantu to provide the most accurate, high-quality answers to clarify all their doubts and answer the questions in the exams with ease. Solutions at Vedantu are curated by experts and are available free of cost.
5. What is Reproduction? Why is Reproduction an important topic of Chapter 6 of Class 8 Science?
Reproduction is the procedure through which a living organism produces more of its kind. Reproduction helps to continue their generation. It is important to study and understand in Class 8 that if there is no reproduction, no living thing can continue to survive. To understand the concepts related to Reproduction and its importance, you must know the basic points as included in the NCERT Solutions for Chapter 6 of Class 8 Science by Vedantu. These are guaranteed to help you to clear your concepts easily and effectively.
6. What is reproduction in animals? Short answer.
Reproduction in animals is the process used by organisms to produce offspring like them. For a better idea of the concept of reproduction and how to write short answers on that topic, refer to NCERT Solutions for Chapter 6 Reproduction in Animals of Class 8 Science at free of cost on the Vedantu website and on the Vedantu app. This will help you to understand the concepts easily and clearly. With the help of the NCERT solutions by Vedantu, you can write down the answers effectively for the exams.
7. What is fertilization, according to Chapter 6 of Class 8 NCERT?
The fusing of the male gamete with the female gamete to form a zygote with the process of sexual reproduction is referred to as fertilization.
Fertilization has been explained in depth in the NCERT Solutions for Chapter 6 of Class 8 Science by Vedantu. If you want to get a good grip of the topics and score well in the exam, it is advisable to download these solutions for quick reference.
8. Why is studying reproduction in animals in class 8 important?
Understanding animal reproduction is essential as it explains how species propagate and ensure their survival. It also helps in understanding the biological processes involved in the continuity of life and genetic variation.
Vedantu’s Class 8 Reproduction In Animals Question Answer offers step-by-step explanations for all the topics covered in the Chapter, helping students understand the process and logic behind each concept.
9. What are the key differences between viviparous and oviparous animals discussed in Reproduction In Animals Class 8 Questions and Answers?
Viviparous animals give birth to live young, and the embryo develops inside the mother's body. Oviparous animals lay eggs, and the embryo develops outside the mother's body within the egg.
NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12
October 11, 2019 by Sastry CBSE
Question 1. What is reproduction? Answer: Reproduction is the biological process by which new individual organisms are produced from their parents.
Question 2. What is sexual reproduction? Answer: Reproduction which involves the fusion of male and female gametes is known as sexual reproduction.
Question 3. What is fertilisation? Answer: The fusion of ova and sperm is called fertilisation.
Question 4. What is a fertilised egg called? Answer: Zygote
Question 5. What is asexual reproduction? Answer: The mode of reproduction in which only a single parent is involved.
Question 6. Which mode of reproduction does take place in human beings? Answer: Sexual reproduction
Question 7. How many partners involve in sexual reproduction? Answer: Two (Parents)
Question 8. Name two animals in which asexual reproduction takes place. Answer: Hydra and yeast
Question 9. Name the reproductive organs of male. Answer: A pair of testes, two spermducts and a penis.
Question 10. Name the reproductive organs of female. Answer: A pair of ovaries, oviducts and uterus.
Question 11. Name the modes of reproduction. Answer:
Question 12. What is male gamete or sperm? Answer: The reproductive cell produced by male reproductive organs is called male gamete or sperm.
Question 13. What is female gamete or ova? Answer: The reproductive cell produced by female reproductive organs is called female gamete or ova.
Question 14. Which organ produces eggs or ovum? Answer: A pair of ovary.
Question 15. Name the male gamete. Answer: Sperm
Question 16. Name the female gamete. Answer: Ova or egg
Question 17. Which male reproductive organ produces sperm? Answer: A pair of testes.
Question 18. In which organ fertilisation take place in female? Answer: Fallopian tube
Question 19. What are the two methods of asexual reproduction? Answer:
Question 20. Name two animals which undergo external fertilisation. Answer: Frog and fish
Question 21. Name two animals which undergo internal fertilisation. Answer: Human being and cow
Question 22. Which type of reproduction takes place in Amoeba? Answer: Asexual reproduction through binary fission.
Question 23. What type of reproduction is cloning? Answer: Asexual reproduction
Question 24. What is foetus? Answer: Foetus is a well developed embryo.
Question 25. What is IVF technique of reproduction? Answer: It is fertilisation outside the body.
Question 26. Give the full form of IVF. Answer: In vitro Fertilisation.
Question 27. How are test tube babies born? Answer: Test tube babies are born through IVF technique.
Question 28. What is cloning? Answer: Cloning is the production of exact copy of a part of or whole living body.
Question 1. Explain two modes of reproduction with examples. Answer: There are two modes of reproduction:
Question 2. Explain the process of fertilisation in brief. Answer: Fusion of the male and female gamete, i.e., sperm and egg is called fertilisation. During fertilisation, the nuclei of the sperm and the egg fuse to form a single nucleus resulting in the formation of a fertilised egg or zygote.
Question 3. What is internal fertilisation? Explain briefly. Answer: Fertilisation which takes place inside the female body is called internal fertilisation. In this a smaller number of ova or eggs are produced. Offsprings have high chance of survival. It occurs mostly in mam¬mals; e.g., in human being, cow, buffalo, etc.
Question 4. Explain briefly the external fertilisation. Answer: In external fertilisation, fusion of male and female gametes take place outside the female body. The female discharge many eggs in the water and the male discharge sperms. The sperms swim to the eggs and fertilise them. It occurs in most of the aquatic animals like frog, fish, starfish, etc.
Question 5. How is an embryo developed? Answer: Fertilisation results in the formation of zygote. The zygote divides repeatedly to give rise to a ball of cells which then begin to form groups that develop into different tissues and organs of the body. This developing structure is called an embryo. It gets embedded in the wall of the uterus for further development.
Question 6. Explain what is foetus. Answer: The embryo continues to develop in the uterus. It gradually develops different body parts such as hands, legs, head, eyes, etc. The stage of the embryo in which all the body parts can be identified is called a foetus. After its development is complete, the mother gives birth to the baby.
Question 7. What are viviparous and oviparous animals? Answer: The animals which give birth to young ones are called viviparous animals and those which lay eggs are called oviparous animals. For example, Mammals including human beings are viviparous animals and hen, lizards, all birds, etc., are oviparous animals.
Question 8. What are sperm and ovum? Explain. Answer: The male gamete is called sperm. It is produced by male reproductive organ, testes. Structurally, it consists of a head attached to a long tail. The tail helps the sperm to move around. The head bears the small nucleus.
Ovum are the female gamete. They are also called egg. They are produced by the female reproductive organ. They consist of larger nucleus. Both sperm and ovum are reproductive cells and contain single cell.
Question 9. Explain briefly the life cycle of a frog. Answer: There are mainly three distinct stages in the life cycle of a frog, i.e., egg → tadpole (larva) → adult. Tadpoles look different from the adults. After sometime tadpoles are converted into an adult frog.
Question 10. Explain in short life cycle of silkworm. Answer: The life cycle of silkworm is completed in four stages. Egg → Larva or Caterpillar → Pupa → Adult In silkworm the caterpillar or pupa looks very different from the adult moth.
Question 1. What do you mean by reproduction? Describe various modes of reproduction. Answer: Reproduction is an important process which is responsible for the continuity of life on the planet earth. In this process, an individual produces young ones of the same species. It helps in increasing the population of the same species on the earth, generation after generation. This is the fundamental feature which ensures the existence of all life forms on the earth. There are two modes of reproduction:
Question 2. What do you mean by metamorphosis? How does metamorphosis take place in frog? Explain with a diagram. Answer: The transformation of the larva into an adult through drastic (sudden or abrupt) changes is called metamorphosis. For example, a moth emerging out of the cocoon, an adult frog from a tadpole, etc., undergo metamorphosis.
The zygote divides repeatedly to give rise to a ball of cell (Refer Fig. 9.7(b)) which further begin to form groups that develop into different tissues and organs of the body. This developing structure is called an embryo. The embryo gets embedded in the wall of the uterus for further development [Refer Fig. 9.7(c)]. The embryo continues to develop in the uterus. It gradually develops different body parts. This developing stage of embryo is called foetu (Fig. 9.16).
Question 7. What is budding? Explain. Answer: Budding is type of asexual reproduction in which an organism or new individual develops from an outgrowth from a single parent. This outgrowth is called bud. On maturation this bud get separated from the parent’s body to grow into new individual. This process of reproduction is known as budding. For example, Hydra, yeast and sponges produce their young ones through the process of budding. In some organisms, like sponges, buds are not separated from their parent’s body and form a colony. They remain attached to parent’s body.
Question 8. Explain how Amoeba reproduce? or Explain in brief the process of binary fission. Answer: Amoeba reproduces through the process of binary fission. Binary fission is another method of asexual reproduction. Amoeba is a single-celled organism. It begins the process of reproduction by the division of its nucleus into two nuclei followed by division of its body into two, each part receiving a nucleus. Finally two daughter cells are produced from one parent Amoeba. This type of asexual reproduction in which an animal reproduces by dividing into two individuals is known as binary fission.
Question 9. What is metamorphosis? Explain. Answer: Some insects and animals undergo a series of changes after birth. Their young ones look quite different from them. The features of these young ones are completely different from the adults. A biological process in which larva transforms into an adult through drastic changes (sudden and abrupt changes) in the body of the animal during the life cycle of an invertebrate or amphibian is called metamorphosis. For example, frog, butterfly, etc., undergo metamorphosis.
Question 10. How are babies produced through IVF technique? What are such babies called? Answer: IVF (In Vitro Fertilisation), is an artificial type of fertilisation. Some women’s oviducts are blocked and so they cannot bear babies because sperms cannot reach the egg for fertilisation. In such cases, freshly released eggs and sperms are kept together for a few hours for IVF (fertilisation outside the body). In case fertilisation occurs, zygote thus formed is allowed to develop for a week and then it is placed in the mother’s uterus. Complete development of baby occurs in uterus and is born like any other baby. Babies born through this technique are called test tube babies.
Question 1. Although two cells called gamete fuse, the product formed is a single cell called zygote. Justify. Answer: During fertilisation, only the male nucleus moves into the egg cell and fuses to the egg nucleus to form zygote which is thus a single cell. The sperm remain outside the egg cell and degenerates after some time.
Question 2. The eggs of frogs do not have shells for protection, yet they are safe in water. How? Answer: A layer of jelly covers the eggs of frog and provides protection. Water help them to float and retain moisture. If eggs are laid in land then they will dry up and die.
Question 3. Mother gives birth to a baby but the baby has characters of both parents. How? Answer: Human beings show sexual reproduction. During fertilisation, two gametes, one from the mother and the other from father, fuse together to form zygote. Therefore baby developed from zygote has characters of both parents though mother gives birth to a baby.
Question 4. Why do only male gametes have a tail? Answer: Male gametes have to reach non-motile female gamete in oviduct from the vagina. So they have a tail to reach the egg cell.
Question 5. Though hen and frog both are oviparous but they have different types of fertilisation. Justify. Answer: In hen, internal fertilisation takes place. The fertilised egg develops into an embryo inside the body. But development of chick from the embryo takes place outside the body. On the other hand, frog shows external fertilisation. The female frog discharge many eggs in the water and the male frog discharge sperms. The sperms swim to the eggs and fertilise them.
Question 6. How does twinning occurs during sexual reproduction? Answer: Twins are two offspring produced by same pregnancy. Non-identical twins results from two fertilised eggs when get implanted in the uterus wall at the same time. Identical twins occur when a single egg is fertilised to form one zygote which then divides into two separate embryos.
Question 1. Ram with his family went to a picnic spot near a pond. He saw some jelly-like mass floating on the sides of the pond. He asked about this to his father. His father explained him that these are frog’s egg and are millions in number. Ram wondered if all of them get hatched, what will happen to other aquatic animals?
Activities and Projects Question 1. Visit a poultry farm. Talk to the manager of the farm and try to find out the answers to the following.
Answer: Visit a poultry farm, you can get answers to these questions. However, answers are given here for your help.
Question 2. Observe live Hydra yourself and learn how they reproduce by doing the following activity: During the summer months collect water weeds from ponds or ditches along with the pond water and put them in a glass jar. After a day or so you may see several Hydra clinging to the sides of the jar. Hydra is transparent, jelly-like and with tentacles. It clings to the jar with the base of its body. If the jar is shaken, the Hydra will contract instantly into a small blob, at the same time drawing its tentacles in. Now take out few Hydras from the jar and put them on a watch glass. Using a hand lens or a binocular or dissection microscope, observe the changes that are taking place in their body. Note down your observations. Answer: Do it yourself.
Question 3. The eggs we get from the market are generally the unfertilised ones. In case you wish to observe a developing chick embryo, get a fertilised egg from the poultry or hatchery which has been incubated for 36 hours or more. You may then be able to see a white disc-like struc¬ture on the yolk. This is the developing embryo. Sometimes if the heart and blood vessels have developed you may even see a red spot. Answer: Do it yourself at home.
Question 4. Talk to a doctor. Find out how twinning occurs. Look for any twins in your neighbourhood, or among your friends. Find out if the twins are identical or non-identical. Also find out why identical twins are always of the same sex? If you know of any story about twins, write it in your own words. You could visit the following websites for information on twins: www. keepkidshealthy.com/twins/expecting_twins.html. For more information on animal reproduction, you can visit: www.saburchill.com/chapters/chap0031.html Answer: Twinning means producing two offspring at a time. It occurs in two ways:
In first case, twins are unidentical or unsimilar whereas in second case, they are identical or similar. Since identical twins are born from same egg (ova) and sperm, i.e., same female and male gametes, they always have same sex. Students are advised to find out all these practically in their neighbourhood with friends.
I. Multiple Choice Questions (MCQs) Choose the correct option. Question 1. The number of modes by which animals reproduce are (a) two (b) three (c) four (d) none of these
Question 2. Binary fission is observed in (a) Hydra (b) yeast (c) Amoeba (d) human being
Question 3. Asexual reproduction is observed in (a) cow (b) buffalo (c) sponge (d) hen
Question 4. In Hydra, the mode of reproduction is (a) asexual (b) sexual (c) both (a) and (b) (d) none of these
Question 5. The animals that produce new young ones are called (a) viviparous (b) oviparous (c) both (d) none of these
Question 6. The male gamete or sperm consists of (a) three parts (b) two parts (c) four parts (d) none of these
Question 7. Ovum or eggs are formed in (a) ovary (b) testes (c) penis (d) ovident
Question 8. Internal fertilisation takes place (a) inside male body (b) inside female body (c) outside female body (d) outside male body
Question 9. In humans, the development of fertilised egg takes place in the (a) ovary (b) oviduct (c) testis (d) uterus
Question 10. The cell formed after fertilisation is called (a) embryo (b) foetus (c) zygote (d) egg
Question 11. The fusion of sperm and ova usually occur in the (a) ovary (b) uterus (c) testes (d) oviduct
Question 12. Sets of reproductive terms are given below. Choose the set that has an incorrect combination. (a) Sperm, testis, sperm duct, penis (b) Menstruation, egg, oviduct, uterus (c) Sperm, oviduct, egg, uterus (d) Ovulation, egg, oviduct, uterus
Question 13. Which of the following shows external fertilisation? (a) Frog (b) Human being (c) Cow (d) Hen
Question 14. Which one of the following is not a part of female reproductive organs? (a) Uterus (b) Ovary (c) Oviduct (d) Penis
Question 15. In the list of animals given below, hen is the odd one out. ‘human being, cow, dog, hen’ The reason for this is (a) it undergoes internal fertilisation (b) it is oviparous (c) it is viviparous (d) it undergoes external fertilisation
Question 16. Animals exhibiting external fertilisation produce a large number of gametes. Pick the appropriate reason from the following (a) The animals are small in size and want to produce more offsprings. (b) Food is available in plenty in water. (c) To ensure better chance of fertilisation. (d) Water promotes production of large number of gametes.
Question 17. Which is not a viviparous animal? (a) Human being (b) Cow (c) Dog (d) Butterfly
Question 18. Budding occurs in (a) Amoeba (b) dog (c) Paramecium (d) yeast
Question 19. The female gamete is called (a) ova (b) sperm (c) zygote (d) uterus
Question 20. The male gamete is called (a) sperm (b) ova (c) embryo (d) zygote Answer: 1. (a) 2. (c) 3. (c) 4. (c) 5. (a) 6. (a) 7. (a) 8. (b) 9. (d) 10. (c) 11. (d) 12. (c) 13. (a) 14. (d) 15. (b) 16. (c) 17. (d) 18. (d) 19. (a) 20. (a)
II. Fill in the Blanks Fill in the blanks with suitable word/s. 1. __________ is the process that ensures continuity of life on earth. 2. __________ are the cells involved in sexual reproduction. 3. The animals which lay eggs are called __________. 4. The animals which give birth to young ones are called __________. 5. __________ is the process of fusion of gametes. 6. The process of reproduction involving fusion of male and female gametes is called __________ reproduction. 7. The testes produce the male gametes called __________. 8. Sperms are __________ in size. 9. Sperm is a __________ cell. 10. The female reproductive organ consists of __________, __________ and __________. 11. The ovary produces female gamete called __________. 12. An ova or egg is a __________ cell. 13. __________ is a fertilised egg. 14. Internal fertilisation takes place inside __________. 15. Babies born through __________ technique are called test tube babies. 16. __________ fertilisation takes place outside the female body. 17. Fertilisation results in the formation of __________ and __________. 18. All living organisms have the power to __________. 19. __________ produces sperm in male. 20. In __________ reproduction only a single parent is involved. Answer: 1. Reproduction 2. Gametes 3. oviparous 4. viviparous 5. Fertilisation 6. sexual 7. sperms 8. very small 9. single 10. ovaries, oviduct, uterus 11. ova (egg) 12. single 13. Zygote 14. female body 15. IVF 16. External 17. zygote, embryo 18. reproduce 19. Testes 20. asexual
IV. True or False State whether the given statements are true or false. 1. Zygote is an unfertilised egg. 2. External fertilisation occurs in frog. 3. An embryo is made up of multicells. 4. Amoeba reproduces by budding. 5. Fertilisation is not necessary in asexual reproduction. 6. Each sperm is multicellular. 7. A new young one is developed from a cell called gamete. 8. Cloning is a sexual reproduction method in any living organisms. 9. Viviparous animals give birth to young ones. 10. Male gametes are sperms. 11. Female gametes are ovum. 12. Starfish reproduces by external fertilisation. 13. Two individuals are needed for sexual reproduction. 14. Internal fertilisation occurs in dogs and cats. 15. An embryo grows in uterus. Answer: 1. False 2. True 3. True 4. False 5. True 6. False 7. False 8. False 9. True 10. True 11. True 12. True 13. True 14. True 15. True
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Class 8 Science chapter on Reproduction in Animals elaborates on the major forms of reproduction in different animals. The mechanism of reproducing individuals of the same species is known as reproduction. A bulk of species replicate by mating, which increases genetic diversity. Males and females have gonads, which are independent sex organs. These gonads contain gametes, which combine together to form the zygote, a single cell. Earthworms, snails, slugs, and a few other species are hermaphrodites, meaning they have both male and female reproductive organs in the same body. Read this blog to find important study notes on Reproduction in Animals Class 10.
Must Read: Some Natural Phenomena Class 8
Modes of reproduction in animals, male reproductive organs, female reproductive organs, internal fertilization, external fertilization, embryo development, types of asexual reproduction.
The first section of Reproduction in Animals Class 10 talks about the forms of animal reproduction. There are various forms of reproduction depending on the number of parents involved. There are two forms of reproduction in animals:
Sexual reproduction is the result of male and female gametes fusing together to create a new organism. Let’s take a look at the human reproductive organs and how they help in fertility as per Class 8 chapter on Reproduction in Animals.
A pair of testes, two sperm ducts, and a penis are among the male reproductive organs. Sperm are male gametes formed by the testes. The testes contain millions of sperm, as shown in the illustration below of a sperm. Despite their tiny scale, sperm have a head, a middle section, and a tail. Each sperm is, in fact, a single cell with all of the normal cell components.
Moving to the next topic in Class 8 Reproduction in Animals, the female reproductive organs constitute a pair of ovaries, oviducts, and the uterus. Ovary creates ova, which are feminine gametes. Per month, one of the ovaries releases a single matured egg into the oviduct in humans. The uterus is the area of the body where the baby develops. An egg is a single cell, much like sperm.
Also Read: Class 8 Reaching the Age of Adolescence
Fertilisation is another important topic you will study in Class 8 Reproduction in Animals. There are millions of sperm in the sperm. During fertilisation, a single sperm fuses with the ova. The egg and sperm nuclei join together to create a new nucleus. As a result, a zygote is formed.
There are two methods of fertilisation:
Internal fertilisation is the process of fertilisation that takes place within the female’s body. People, pigs, dogs, and other species are examples. In terrestrial animals, this approach is more common. Some marine species, however, also use this technique. This may happen either by the male directly injecting sperm into the female reproductive tract or by the male depositing sperm in the area, which the female picks up and injects into her reproductive tract.
They are three ways by which babies are produced by internal fertilization:
External fertilisation refers to fertilisation that happens outside of the person. Frogs and fish, for example. The majority of fertilisation occurs during the spawning period. Spawning is triggered by environmental signals such as water temperature.
Oviparous and viviparous animals are two separate classes of animals categorised according to how they fertilise their offspring. The main difference between oviparous and viviparous animals are listed below:
Basis | ||
Definition | Egg-laying animals are called Oviparous. | Animals that give birth to the young ones are called Viviparous. |
Fertilization | Fertilization can be either internal or external. | Fertilization can only be internal. |
Development of embryo | Nutrient is provided by the egg yolk. | Nutrient is provided by the mother through the placenta |
Development of zygote | The embryo develops very little or not at all inside the mother. | The embryo grows completely inside the mother’s womb. |
Chances of Survival | Since the eggs are laid outside the womb, there are less chances of survival. | Since the young one is safe within the mother, it has a better chance of surviving. |
Examples | Insects, hens, fish, amphibians, etc. | Humans, dogs, cats, horses, etc. |
The zygote separates into a ball of cells after repeated divisions. This is known as the developing embryo. These cells differentiate into respective tissues and organs. The embryo gets implanted in the uterine wall. This process is known as implantation.
A foetus is formed when all of the embryo’s body parts become apparent. In humans, the foetus develops after nine months.
Must Read: Cell Structure and Function Class 8
Asexual reproduction is the second most common form of reproduction in animals, after sexual reproduction. Lower species and unicellular microbes are the most common examples of this form of reproduction.
It is the mechanism by which a new entity is created without the presence of the gamete formation by a single parent. Genetically and morphologically, the individuals produced are alike. It’s found in single-celled species. There is no fertilisation and the cells separate by mitotic division. The separation happens very fast.
Let’s take a look at the types of asexual reproduction as elaborated in Class 8 Reproduction in Animals:
Binary Fission Amoeba and euglena are examples of Binary Fission. The parent cell goes through mitosis and grows in size. The nucleus separates as well. Two equivalent daughter cells, each with a nucleus, are obtained. Binary fission is the most common form of reproduction for prokaryotes including bacteria.
Budding In this situation, the offspring emerges from the parent’s womb. When it matures, it stays bound to the parent. It separates from the parent after maturation and survives as a separate entity. Hydras use this method of reproduction the most.
Fragmentation When the body of an entity, such as a Planarian, splits into many parts, each piece develops into an independent offspring. Fragmentation is the term for this. It may happen as a result of predator-caused harm or as a natural form of reproduction. A fractured arm develops into a full organism in a few species, such as the sea star.
Regeneration It is a form of fragmentation that is found mainly in Echinoderms. When a part of an individual, such as an arm, splits from its parent body, it transforms into a different entity. This is referred to as regeneration.
Parthenogenesis This is an asexual reproduction method in which the egg forms without being fertilised. Bees, wasps, ants, aphids, rotifers, and other insects engage in this process. Hemiploid males are produced by ants, wasps, and bees. When females were separated from males, parthenogenesis was found in a few vertebrates such as hammerhead sharks, Komodo dragons, and blacktop sharks.
We hope that this blog has provided you with a deeper understanding of Class 8 Reproduction in Animals. Check out our Class 8 study notes section to find similar material for Class 8 subjects! Don’t forget to follow Leverage Edu on Instagram , Facebook and Twitter to stay updated with the latest educational news!
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Free mcq test, table of content, reproduction in animals test - 20.
Duration: 10 Mins
Maximum Marks: 10
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The chapter Reproduction in Animals is one of the important chapters in class 8. The highly qualified experts of Selfstudys developed these Reproduction in Animals class 8 MCQ to test what students have learnt and also helps them to identify their strengths and weaknesses.
These MCQ on Reproduction in Animals history class 8 are developed as per the latest pattern of CBSE (Central Board of Secondary Education). If a student wants to secure good marks in their exams, then they should attempt Reproduction in Animals class 8 MCQ.
The MCQ on Reproduction in Animals history class 8 is created with detailed explanation of concepts which can help students understand the concepts better and also increases their objective knowledge.
By regularly practising the MCQ on Reproduction in Animals History class 8, the students will get to know about the most common repeated questions. They will also get to know about the HOTS Questions (High Order Thinking Skills). The Reproduction in Animals class 8 MCQ also helps the students to do a thorough revision for their final examinations.
The Reproduction in Animals class 8 MCQ is developed as per the question papers of the last 5 years to help the students to give an idea about the most repeated questions and also about the pattern of the examination.
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According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 6 in NCERT Class 8 Science Textbook.
1. Where are the ovum or the eggs formed?
(a) testes (b) penis (c) ovary (d) ovident
2. Where do the fusion of the sperm and the ova usually take place?
(a) uterus (b) testes (c) ovary (d) oviduct
3. Animals exhibiting external fertilisation produce numerous gametes. Justify with a reason from the one given below:
(a) The animals are small and want to produce more offspring (b) Food is available in plenty of water (c) To ensure a better chance of fertilisation (d) Water promotes the production of numerous gametes
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Here we are providing case study questions for CBSE Class 8 Science Chapter 9 Reproduction in Animals. Case Study Questions. Question 1: Read the passage carefully and answer the questions that follow-. For the continuity of life, all living things produce organisms of their own kind.
Que. 2) (a) Caterpillar. Que. 3) (d) Cow. Que. 4) Answer:In sexual reproduction, the reproductive parts produce gametes that fuse to form a zygote. The zygote develops into a new individual. Que. 5) Answer: The two modes of reproduction in animals include: i) Sexual reproduction ii) Asexual reproduction.
Q6: How can teachers incorporate case study questions on Reproduction in Animals class 8 science into classroom teaching? A6: Teachers can integrate case studies into lesson plans, group discussions, or interactive activities to engage students in active learning, promote problem-solving skills, and facilitate a deeper understanding of ...
The Case Study Based Questions: Reproduction in Animals is an invaluable resource that delves deep into the core of the Class 8 exam. These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
The NCERT Exemplar for Class 8 Science Chapter 9 will benefit you immensely, as the solutions help you understand the topics in-depth. Besides, this will aid in learning advanced topics. This exemplar has a variety of questions and answers which you can rely on for your exam preparation. The chapter Reproduction in Animals is about learning the ...
Long Answer Type Questions. Question 1: Describe the process of fertilization in human beings. Answer: The first step in the process of reproduction is the fusion of a sperm and an ovum. When sperms come in contact with an egg, one of the sperms may fuse with the egg. Such fusion of the egg and the sperm is called fertilization.
NCERT Solutions for Class 8 Science Chapter 9 - 5 Mark Questions and Answers. Question 1. Indicate whether the following statements are True (T) or False (F). [NCERT] Oviparous animals give birth to young ones. ( ) Each sperm is a single cell. ( ) External fertilisation takes place in frog.
It includes Multiple Choice Questions, Case-based Questions, Assertion-Reasoning Questions, and even Source-Based Questions to help the students undergo an intelligent preparation process. The intent of these questions is to facilitate self-practice. They will test your ability to apply what you have learned rather than testing your memory.
There are two modes of reproduction in animals: Sexual Reproduction. Asexual Reproduction. Similarities between Reproduction in Plants and Animals. Plants and animals can both undergo the sexual and asexual process of reproduction. Just like plants, in animals, the males and females have different reproductive organs.
Get Notes, NCERT Solutions and Extra Questions of Chapter 9 Class 8 NCERT - Reproduction in Animals. Teachoo provides the best content to learn about Reproduction with NCERT questions, worksheets, extra questions and revision notes. In this chapter, we will learn. What is Reproduction. Different Modes of Reproduction.
Answer. (a) In human beings, sexual reproduction takes place by the combination of gametes, i.e. sperm and egg, formed in male and female, respectively. The fusion of gametes is called fertilisation. The fusion forms a zygote, which divides repeatedly to form the embryo.
2. Binary Fission. a) Binary fission is a method of asexual reproduction commonly observed in single-celled organisms like bacteria and protozoa. In this process, a single parent cell divides into two daughter cells, each identical to the parent. It is a simple and efficient way for these organisms to reproduce and increase their population rapidly.
The PPT: Reproduction in Animals is an invaluable resource that delves deep into the core of the Class 8 exam. These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
The "Important Questions: Reproduction in Animals Class 8 Questions" guide is a valuable resource for all aspiring students preparing for the Class 8 exam. It focuses on providing a wide range of practice questions to help students gauge their understanding of the exam topics.
Sexual reproduction. The type of reproduction, which involves two parents to give rise to an offspring is called sexual reproduction. The males and females have different reproductive parts or organs. These organs produce the male and female gametes, which fuse together to form the offspring.
Answer 1. C) Sperm → oviduct, egg → uterus. Reproduction is a process in which organisms make more organisms similar to themselves. Millions of these sperm are in this small amount of semen, and they swim up from the vagina through the cervix following the uterus to meet the egg present in the fallopian tube.
Class 8 Reproduction In Animals Question Answer helps students learn about the structural adaptations of different animals for reproduction, such as the reproductive organs and their functions. Vedantu offers supplementary resources such as video lectures, quizzes, and study materials to complement the chapter solutions, providing a holistic ...
Question 8. Name two animals in which asexual reproduction takes place. Answer: Hydra and yeast. Question 9. Name the reproductive organs of male. Answer: A pair of testes, two spermducts and a penis. Question 10. Name the reproductive organs of female. Answer: A pair of ovaries, oviducts and uterus.
Visit the Selfstudys website. Bring the arrow towards the CBSE which can be seen in the navigation bar/ button. Select New Revision notes from the given list. A new page will appear, select Class 8th from the list of classes. Again a new page will appear, select the Reproduction in Animals to access the Notes.
Class VIII Science. Notes for Reproduction in Aniamals. Facts the Matter. • The process of reproduction is not essential for the survival of an individual but reproduction is essential for the continuation of a species. • Modes of Reproduction: Like plants, animal also reproduce by (i) Sexual reproduction and (ii) Asexual reproduction.
Class 8 Science chapter on Reproduction in Animals elaborates on the major forms of reproduction in different animals. The mechanism of reproducing individuals of the same species is known as reproduction. A bulk of species replicate by mating, which increases genetic diversity. Males and females have gonads, which are independent sex organs.
Steps To Attempt The Reproduction in Animals Class 8 MCQ. If students want to attempt Reproduction in Animals class 8 MCQ, they need to follow the following steps: The first step is to go to the official website of selfstudys i.e. selfstudys.com. Click on the three lines on the upper left side, and then tap on the 'CBSE' Option, scroll down ...
1. Where are the ovum or the eggs formed? 2. Where do the fusion of the sperm and the ova usually take place? 3. Animals exhibiting external fertilisation produce numerous gametes. Justify with a reason from the one given below: Important Questions Class 8 Science Chapter 9 Reproduction Animals are provided here which can help the students to ...