NCERT Question 6 - Chapter 9 Class 8 - Reproduction In Animals

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

Answer

Reproduction of new organisms from a single parent , without the involvement of sex cells is called asexual reproduction

The offsprings produced are exact copies of their parents.

Examples - Amoeba,Hydra

Different Methods of Asexual Reproduction

Binary Fission

In Binary Fission,organism reproduces by dividing itself into 2 parts

Example

Amoeba splits itself to form new amoeba

Procedure

1. A fully grown amoeba is a cell which has nucleus and cytoplasm
2. Nucleus splits to form 2 nucleus
3. Cytoplasm also divides
4. 2 small amoeba formed

Image - fig 16 of lakhmir singh

Budding

It is a kind of asexual reproduction in which different buds or bulges develop into new organisms

Example

Hydra uses budding to reproduce

Procedure

1. A bulge or bud develops on side of hydra
2. Slowly it develops into new hydra
3. This new hydra separates from the parent hydra to form new hydra

Image - hydra image, fig 17 lakhmir singh and fig 9.11 ncert combination