Question

why animal which undergoes external fertilization lay hundreds of egg​

Answer 1

Explanation:

male and female animal release their sperms and eggs in water where fertilisation take place by collision between sperm and eggs. ... Though the animals like frog and fish which undergo external fertilisation, lay hundreds of eggs , all the eggs do not get fertilised and hence do not develop into new frogs.

Answer 2

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These animals lay hundreds of eggs but all the eggs do not fertilise and develop into new individuals. The eggs get exposed to water movement, wind and rainfall. Other animals also feed on eggs. Thus production of large numbers of eggs ensure fertilisation of atleast few of them.

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