Reproduction in Animals Part 1: MCQs (Q1–Q25)
🐣 Reproduction in Animals – MCQs for Class 8 Science
Part 1: Q1–Q25
Q1. The process by which living organisms produce new individuals is called:
A) Fertilization
B) Reproduction
C) Gametogenesis
D) Ovulation
✅ Correct Answer: B) Reproduction
Explanation:
- A) Fertilization – Fusion of gametes.
- B) ✔ Reproduction = producing offspring.
- C) Gametogenesis – Formation of gametes.
- D) Ovulation – Release of ovum.
Q2. Which type of reproduction involves only one parent?
A) Sexual reproduction
B) Asexual reproduction
C) Binary fission
D) Fertilization
✅ Correct Answer: B) Asexual reproduction
Explanation:
- A) Sexual – Two parents needed.
- B) ✔ Asexual = one parent only.
- C) Binary fission – Example of asexual.
- D) Fertilization – Sexual process.
Q3. Fertilization that occurs outside the female body is called:
A) Internal fertilization
B) External fertilization
C) Cross fertilization
D) Double fertilization
✅ Correct Answer: B) External fertilization
Explanation:
- A) Internal – Fusion inside body.
- B) ✔ External → outside female body (e.g., fish, frog).
- C) Cross – Between different organisms.
- D) Double – Plants (angiosperms).
Q4. Which of these animals shows external fertilization?
A) Human
B) Frog
C) Dog
D) Cow
✅ Correct Answer: B) Frog
Explanation:
- A, C, D – Internal fertilization.
- B) ✔ Amphibians like frogs → external fertilization.
Q5. Male gametes in humans are called:
A) Ovum
B) Zygote
C) Sperm
D) Embryo
✅ Correct Answer: C) Sperm
Explanation:
- A) Ovum – Female gamete.
- B) Zygote – Fertilized cell.
- C) ✔ Sperm = male gamete.
- D) Embryo – Developed zygote.
Q6. Fertilized egg is called:
A) Ovum
B) Embryo
C) Zygote
D) Foetus
✅ Correct Answer: C) Zygote
Explanation:
- A) Ovum – Unfertilized egg.
- B) Embryo – Early development stage.
- C) ✔ Zygote = fusion of sperm + egg.
- D) Foetus – Later development.
Q7. Which of these animals give birth to young ones?
A) Frog
B) Hen
C) Cow
D) Fish
✅ Correct Answer: C) Cow
Explanation:
- A, B, D – Lay eggs.
- C) ✔ Cow is viviparous → gives birth.
Q8. The animals that lay eggs are called:
A) Viviparous
B) Oviparous
C) Mammals
D) Placental
✅ Correct Answer: B) Oviparous
Explanation:
- A) Viviparous – Give birth to young ones.
- B) ✔ Oviparous → lay eggs (birds, reptiles, fish).
- C, D – Not correct terms here.
Q9. Which of the following is viviparous?
A) Hen
B) Dog
C) Lizard
D) Crocodile
✅ Correct Answer: B) Dog
Explanation:
- A, C, D – Oviparous (lay eggs).
- B) ✔ Dogs give birth to young ones.
Q10. The process of fusion of sperm and egg is called:
A) Ovulation
B) Fertilization
C) Reproduction
D) Implantation
✅ Correct Answer: B) Fertilization
Explanation:
- A) Ovulation – Release of ovum.
- B) ✔ Fertilization = sperm + egg fusion.
- C) Reproduction – Broader process.
- D) Implantation – Attachment of embryo.
Q11. Which type of fertilization occurs in humans?
A) External
B) Internal
C) Asexual
D) Double
✅ Correct Answer: B) Internal
Explanation:
- A, C, D – Not in humans.
- B) ✔ Internal fertilization → sperm meets egg inside female body.
Q12. A developing embryo with body parts visible is called:
A) Ovum
B) Zygote
C) Foetus
D) Gamete
✅ Correct Answer: C) Foetus
Explanation:
- A, B, D – Early stages.
- C) ✔ Foetus = advanced embryo with organs.
Q13. In which organ of the female does the embryo develop?
A) Ovary
B) Uterus
C) Oviduct
D) Vagina
✅ Correct Answer: B) Uterus
Explanation:
- A) Ovary – Produces ovum.
- B) ✔ Uterus = site of embryo growth.
- C) Oviduct – Fertilization site.
- D) Vagina – Birth passage.
Q14. Which organ produces eggs in females?
A) Ovary
B) Oviduct
C) Uterus
D) Cervix
✅ Correct Answer: A) Ovary
Explanation:
- A) ✔ Ovaries produce eggs (ova).
- B, C, D – Not egg-producing organs.
Q15. How many chromosomes are there in human gametes?
A) 23
B) 46
C) 22
D) 44
✅ Correct Answer: A) 23
Explanation:
- A) ✔ Gametes are haploid (23).
- B) 46 – Diploid in body cells.
- C, D – Incorrect values.
Q16. The fertilization in frog takes place in:
A) Water
B) Oviduct
C) Uterus
D) Ovary
✅ Correct Answer: A) Water
Explanation:
- A) ✔ Frogs → external fertilization in water.
- B, C, D – Internal only.
Q17. Which of these reproduces by binary fission?
A) Hydra
B) Amoeba
C) Frog
D) Cow
✅ Correct Answer: B) Amoeba
Explanation:
- A) Hydra – Budding.
- B) ✔ Amoeba divides by binary fission.
- C, D – Sexual reproduction.
Q18. Budding is a type of:
A) Sexual reproduction
B) Asexual reproduction
C) Internal fertilization
D) External fertilization
✅ Correct Answer: B) Asexual reproduction
Explanation:
- A) Needs gametes.
- B) ✔ Budding → single parent (e.g., Hydra, yeast).
- C, D – Fertilization methods.
Q19. Which of the following shows budding?
A) Hydra
B) Frog
C) Fish
D) Dog
✅ Correct Answer: A) Hydra
Explanation:
- A) ✔ Hydra → buds grow into new organisms.
- B, C, D – Sexual reproduction.
Q20. Which of these is an example of oviparous animals?
A) Dog
B) Cow
C) Hen
D) Cat
✅ Correct Answer: C) Hen
Explanation:
- A, B, D – Give birth.
- C) ✔ Hen lays eggs.
Q21. Fertilization results in formation of:
A) Ovum
B) Embryo
C) Zygote
D) Foetus
✅ Correct Answer: C) Zygote
Explanation:
- A) Ovum – Unfertilized.
- B) Embryo – Later stage.
- C) ✔ First product = zygote.
- D) Foetus – Advanced stage.
Q22. Which of these reproduces by budding in unicellular form?
A) Hydra
B) Yeast
C) Amoeba
D) Spirogyra
✅ Correct Answer: B) Yeast
Explanation:
- A) Hydra – Multicellular budding.
- B) ✔ Yeast reproduces asexually by budding.
- C, D – Other methods.
Q23. What is the function of sperm tail?
A) Carry DNA
B) Movement
C) Egg fertilization
D) Energy production
✅ Correct Answer: B) Movement
Explanation:
- A) DNA in sperm head.
- B) ✔ Tail provides motility.
- C) Fertilization happens with head.
- **D) Mitochondria make energy.
Q24. Which of the following is NOT a viviparous animal?
A) Cat
B) Cow
C) Hen
D) Dog
✅ Correct Answer: C) Hen
Explanation:
- A, B, D – Give birth.
- C) ✔ Hen lays eggs → oviparous.
Q25. Which of the following is formed after repeated cell division of zygote?
A) Ovum
B) Embryo
C) Foetus
D) Gamete
✅ Correct Answer: B) Embryo
Explanation:
- A, D – Gametes/ovum are before fertilization.
- B) ✔ Zygote divides → embryo.
- C) Foetus → later stage.
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