Question

state the reason why most of the terrestrial animals fertilsation takes place internally​

Answer 1

Explanation:

Fertilisation in most of terrestrial animals takes place internally because gametes need water to survive, sperm transference from the male to the female body needs water for the movement of sperm thus avoiding the dehydration for these cells.

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Answer 2

Answer:

Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young. Internal fertilization also enhances the fertilization of eggs by a specific male.