Animal reproduction, Biology

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Animal Reproduction -

Reproduction is the ability to produce new organism of its own type. It is meant to increase their number.

Reproduction includes -

(i) Replication of DNA                                          

(ii) Cell division

(iii) Formation of reproduction units                      

(iv) Division into offsprings.

Animals reproduce mainly in two ways -

S.NO.

ASEXUAL

SEXUAL

 

1.

 

2.

 

3.

 

4.

 

5.

 

6.

 

7.

 

8.

 

9.

 

10.

 

It is uniparental

 

Gametes are not formed

 

Reproductive organs are not needed

 

No fertilisation

 

Offsprings are similar to parent

 

New characters do not appear

 

No variation

 

No evolution

 

Definite process

 

Generation leads to extinction

 

uni / biparental

 

formed

 

needed.

 

fertilisation occur

 

different

 

appear

 

variation present

 

evolution takes place

 

Indefinite process

 

Not so


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