Reproduction in Animals Class 8 Important Questions

Reproduction in Animals Class 8 Important Questions are very useful for students preparing for exams. This chapter (Science Chapter 9 – Reproduction in Animals) explains how animals reproduce through sexual and asexual reproduction, how fertilisation happens, and how an embryo develops into a new organism.

By practicing these important short answer questions, long answer questions, HOTS, and value-based questions, students can revise the full chapter quickly. These questions are designed as per the latest CBSE Class 8 Science syllabus and will help you score better marks in school exams and prepare for board-level tests.

Students can also download the Reproduction in Animals Class 8 Important Questions PDF for offline study and regular revision.

Very Short Answer Important Questions – Chapter 9 Reproduction in Animals Class 8

Practicing very short answer questions from Class 8 Science Chapter 9 – Reproduction in Animals helps students revise quickly and score well in exams. These one-line questions focus on important definitions and key terms from the chapter.

Important Very Short Answer Questions

Q1. Name two modes of reproduction in animals.
Ans: Sexual reproduction and asexual reproduction.

Q2. What is the male reproductive cell called?
Ans: Sperm.

Q3. What is the female reproductive cell called?
Ans: Ovum (egg).

Q4. What is fertilisation?
Ans: The process of fusion of sperm and egg to form a zygote.

Q5. Where does fertilisation take place in humans?
Ans: In the oviduct (fallopian tube).

Q6. Which organism reproduces by budding?
Ans: Hydra.

Q7. Which organism reproduces by binary fission?
Ans: Amoeba.

Q8. Give one example of oviparous animals.
Ans: Hen.

Q9. Give one example of viviparous animals.
Ans: Cow.

Q10. What is metamorphosis?
Ans: A drastic change in the body of an organism during its life cycle, e.g., tadpole turning into a frog.

Short Answer Important Questions – Reproduction in Animals Class 8

The following short answer important questions from Class 8 Science Chapter 9 Reproduction in Animals are helpful for exams. These questions test understanding of concepts like fertilisation, oviparous/viviparous animals, metamorphosis, and reproductive organs.

Important Short Answer Questions with Answers

Q1. Differentiate between oviparous and viviparous animals with examples.
Ans: Oviparous animals lay eggs (e.g., hen), while viviparous animals give birth to young ones (e.g., cow).

Q2. What is metamorphosis? Explain with an example.
Ans: Metamorphosis is a drastic change in body form during development. For example, a tadpole changes into an adult frog.

Q3. Explain internal and external fertilisation with one example each.
Ans: Fertilisation inside the female’s body is internal (e.g., humans). Fertilisation outside the body is external (e.g., frogs).

Q4. How does reproduction in Hydra differ from that in Amoeba?
Ans: Hydra reproduces by budding, while Amoeba reproduces by binary fission.

Q5. Why is fertilisation important in reproduction?
Ans: Fertilisation forms a zygote, which grows into a new organism, ensuring continuation of species.

Q6. State the functions of the uterus in humans.
Ans: The uterus provides a safe place for the embryo to implant, develop, and grow into a foetus.

Q7. What is the role of placenta during pregnancy?
Ans: Placenta helps in exchange of nutrients, gases, and wastes between the mother and the developing foetus.

Long Answer Important Questions – Reproduction in Animals Class 8 

Q1. Explain the structure and functions of the human female reproductive system.
Ans:
The female reproductive system has four main parts:

• Ovaries: They produce eggs (ova) and release hormones.
• Oviducts (fallopian tubes): Fertilisation of sperm and egg takes place here. They also carry the zygote to the uterus.
• Uterus: It is the place where the fertilised egg gets implanted. The embryo grows here until it becomes a foetus.
• Vagina: It is the passage which helps in birth of the baby.

Thus, the female reproductive system helps in the process of fertilisation, development of the embryo and finally birth.

Q2. Describe the process of fertilisation and development of the embryo in humans.
Ans:
When the sperm fuses with the ovum, fertilisation takes place in the oviduct. The fertilised egg is called a zygote. The zygote divides again and again to form an embryo. The embryo moves into the uterus and gets fixed in the wall. This process is called implantation.
The embryo develops further with the help of the placenta, which provides food and oxygen from the mother’s blood. Slowly, the embryo grows into a foetus and after complete growth, the baby is born.

Q3. Compare internal and external fertilisation. Mention one advantage of each.
Ans:

• Internal fertilisation: This happens inside the female body. For example – humans, cows. Advantage: The embryo is safe inside the mother’s body, so survival chances are high.
• External fertilisation: This happens outside the body, usually in water. For example – frogs, fish. Advantage: Many eggs are produced at the same time, so chances of species survival increase.

Q4. Explain the life cycle of a frog with the role of metamorphosis.
Ans:
Frogs reproduce by external fertilisation. The male and female release their gametes in water and the fertilised egg develops outside. The egg hatches into a tadpole, which looks very different from an adult frog. The tadpole has gills for breathing and a tail for swimming. Slowly, the tadpole undergoes metamorphosis – it grows lungs, develops legs, and the tail disappears. Finally, it becomes an adult frog.

Q5. Why is reproduction important for living organisms? Explain with examples.
Ans:
Reproduction is very important because it ensures the continuation of species. Without reproduction, animals and plants will die out and disappear. For example – cows reproduce to increase their population, and plants reproduce so that more plants can grow. In this way, reproduction helps life to continue on earth.

HOTS & Application-Based Questions – Reproduction in Animals Class 8

These Higher Order Thinking Skills (HOTS) and application-based important questions from Class 8 Science Chapter 9 test your reasoning and understanding. They are very useful for exams, Olympiads, and concept clarity.

Important HOTS Questions with Answers

Q1. Why do aquatic animals like frogs produce hundreds of eggs at one time?
 Ans: Frogs use external fertilisation. The eggs are laid in water, where many get eaten or destroyed. To increase the chance of survival, frogs produce hundreds of eggs at once.

Q2. What will happen if the oviduct in a woman gets blocked?
 Ans: If the oviduct is blocked, the egg cannot meet the sperm, so fertilisation will not take place. As a result, pregnancy cannot occur.

Q3. Why are frogs’ eggs covered with a jelly-like substance instead of a hard shell like birds’ eggs?
 Ans: Frogs lay eggs in water, so the jelly protects the eggs and provides a moist covering. Birds lay eggs on land, so they have hard shells to protect them from drying and external damage.

Application-Based Questions with Answers

Q4. A scientist observed an organism reproducing without gametes. Which type of reproduction was it?
 Ans: It was asexual reproduction, because gametes (sperm and egg) were not involved. Example – Amoeba.

Q5. A child shows features from both father and mother. Which type of reproduction explains this?
 Ans: This happens due to sexual reproduction, because traits from both parents combine during fertilisation.

Q6. During an experiment, sperm and eggs of fish were mixed in water. What kind of fertilisation does this show?
 Ans: This shows external fertilisation, because the gametes fused outside the body in water.