Question

Hy friends...

(1). Different between external and internal fertilization . Give two examples of each .

(2). Write factors responsible for population growth in India .

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Answer 1

the difference between internal and external fertilization in in external fertilization The fertilization of human sperm male and female the difference between internal and external fertilization is the fusion of male and female gamete which take place of outside the body is called external fertilization it is very common in aquatic animals such as fish starfish fertilization which take place inside the body is called internal and fertilization internal fertilization occur in many animals including human

Answer 2

1) >EXTERNAL FERTILIZATION:-

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• It occurs the outside the body of female.

• A large number of gametes are released in the surrounding medium ( eg :- water ) where fertilization takes place.

• Examples :- Bony fish , Amphibians , most of Algae etc....

> INTERNAL FERTILIZATION:-

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• It occurs inside the body of the female.

• The number of gametes produced is less . The male gametes are deposited in thebody of the female with the help of copulatory organ .

• Examples :- Repltiles , Birds , Mammals , Bryophytes and Tracheophytes ( Pteridophytes , Gymnosperms , Angiosperms ) etc...

2) • Widening gap between Birth and Death rates.

• Low age at marriage.

• High illiteracy .

• Religious attitude towards family planning .

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