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NCERT solutions Science Class 8 chapter 9 Reproduction in Animals

Chapters

NCERT Science Class 8

Science Textbook For Class 8

Chapter 9 - Reproduction in Animals

Pages 110 - 111

Explain the importance of reproduction in organisms.

Q 1 | Page 110

Describe the process of fertilization in human beings.

Q 2 | Page 110

Choose the most appropriate answer.

(a) Internal fertilization occurs

(i) in female body.

(ii) outside female body.

(iii) in male body.

(iv) outside male body.

Q 3.1 | Page 110

Choose the most appropriate answer.

A tadpole develops into an adult frog by the process of

(i) fertilization

(ii) metamorphosis

(iii) embedding

(iv) budding

Q 3.2 | Page 110

The number of nuclei present in a zygote is

(i) none

(ii) one

(iii) two

(iv) four

Q 3.3 | Page 110

Indicate whether the following statements are True (T) or False (F).

An embryo is made up of a single cell. ( )

Q 4.1 | Page 110

Indicate whether the following statements are True (T) or False (F).

Oviparous animals give birth to young ones. ( )

Q 4.1 | Page 110

Indicate whether the following statements are True (T) or False (F).

Each sperm is a single cell. ( )

Q 4.2 | Page 110

Indicate whether the following statements are True (T) or False (F).

External fertilization takes place in frogs. ( )

Q 4.3 | Page 110

Indicate whether the following statements are True (T) or False (F).

A new human individual develops from a cell called gamete. ( )

Q 4.4 | Page 110

Indicate whether the following statements are True (T) or False (F).

Egg laid after fertilization is made up of a single cell. ( )

Q 4.5 | Page 110

Indicate whether the following statements are True (T) or False (F).

Amoeba reproduces by budding. ( )

Q 4.6 | Page 110

Indicate whether the following statements are True (T) or False (F).

Fertilization is necessary even in asexual reproduction. ( )

Q 4.7 | Page 110

Indicate whether the following statements are True (T) or False (F).

Binary fission is a method of asexual reproduction. ( )

Q 4.8 | Page 110

Indicate whether the following statements are True (T) or False (F).

A zygote is formed as a result of fertilization. ( )

Q 4.9 | Page 110

Give two differences between a zygote and a foetus.

Q 5 | Page 110

Define asexual reproduction. Describe two methods of asexual reproduction in animals.

Q 6 | Page 110

In which female reproductive organ does the embryo get embedded?

Q 7 | Page 110

What is metamorphosis? Give examples.

Q 8 | Page 110

Differentiate between internal fertilization and external fertilization.

Q 9 | Page 110

Complete the crossword puzzle using the hints given below.

Across

1. The process of the fusion of the gametes.

6. The type of fertilization in hen.

7. The term used for bulges observed on the sides of the body of Hydra.

8. Eggs are produced here

Down

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.

Q 10 | Page 111

NCERT Science Class 8

Science Textbook For Class 8
S