NCERT Class VIII Science Solutions: Chapter 9-Reproduction in Animals Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 1:

Explain the importance of reproduction in organisms.

Answer:

  • Reproduction is essential for the continuation of a species.
  • It ensures the continuation of similar kinds of individuals, generation after generation.

Question 2:

Describe the process of fertilization in human beings.

Answer:

There is sexual reproduction in human beings. Male reproductive organs produce sperms (male gametes) while the female gametes produce ova (female gametes) . The sperms are ejected inside female bodies where they fuse with ovum and forms zygote (called internal fertilization) . The zygote begins to develop into an embryo which attaches to the female uterus wall. The embryo further multiples into many cells and develops further into a small baby called fetus.

Result for Process of Fertilization in Human

Question 3:

Choose the most appropriate answer:

  1. Internal fertilization occurs.
  2. In female body.
  3. Outside female body.
  4. In male body.
  5. Outside male body.
  6. A tadpole develops into an adult frog by the process of
  7. Fertilization.
  8. Metamorphosis.
  9. Embedding.
  10. Budding.
  11. The number of nuclei present in a zygote is.
  12. None.
  13. One.
  14. Two.
  15. Four.

Answer:

  1. Internal fertilization occurs in female body.
  2. A tadpole develops into an adult frog by the process of metamorphosis.
  3. The number of nuclei present in a zygote is one.