NCERT Class VIII Science Solutions: Chapter 9-Reproduction in Animals Part 1 (For CBSE, ICSE, IAS, NET, NRA 2023)
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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.
Question 3:
Choose the most appropriate answer:
- Internal fertilization occurs.
- In female body.
- Outside female body.
- In male body.
- Outside male body.
- A tadpole develops into an adult frog by the process of
- Fertilization.
- Metamorphosis.
- Embedding.
- Budding.
- The number of nuclei present in a zygote is.
- None.
- One.
- Two.
- Four.
Answer:
- Internal fertilization occurs in female body.
- A tadpole develops into an adult frog by the process of metamorphosis.
- The number of nuclei present in a zygote is one.