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Question

Differentiate between internal fertilisation and external fertilisation.

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Solution

Internal fertilizationExternal fertilization
In this, the sperm will fertilize the egg within the female.In this, the sperm will fertilize the egg outside of the organism
It has higher survival rate.It has lower survival rate.
It protects the fertilized egg from predation and harsh environments.
It does not protect the fertilized egg from predation or harsh environments.
It is shown by cartilagenous fishes like sharks, skates, rays.It is shown by fishes like salmon, cod.

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