Question

97. Why animals which undergo external fertilisation lay hundreds of eggs

Answer 1

The eggs get exposed to water movement, wind and rainfall. Other animals also feed on eggs. Thus, production of large number of eggs ensure fertilisation of at least few of them.

Answer 2

The eggs get exposed to water movement, wind and rainfall. Other animals also feed on eggs. Thus, production of large number of eggs ensure fertilisation of at least few of them.