Question

Differentiate between internal fertilisation and external fertilisation.


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Answer 1

Question:

Differentiate between internal fertilisation and external fertilisation.

Answer:

The fusion of a sperm with an ovum to form a zygote during sexual reproduction, is called Fertilisation.

ㅤThe Fertilisation of an egg by an sperm can take place either inside the body of the female or outside the body. This leads to two modes of fertilisation:

• Internal Fertilisation
• External Fertilisation

ㅤThe Fertilisation which occurs inside the female body is called Internal Fertilisation . In internal Fertilisation, the female animal's eggs are fertilised by sperms inside her body. In mammals, birds and reptiles, the Fertilisation occurs inside the female body.

ㅤThe Fertilisation which occurs outside the female body is called External Fertilisation.In external Fertilisation, the female animal's eggs are fertilised by sperms outside her body. In Amphibians and fishes, the Fertilisation of eggs occurs outside the female body.

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Answer 2

Answer:

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