Question

Animals like fish and frog lays large no of eggs why​

Answer 1

this is b'coz usually there eggs are eaten up by other aquatic animals.

in order to maintain there species it's very essential to them to lay eggs in thousands at a time so that some may fertilize and grow

Answer 2

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Though fish and frogs lay hundreds of eggs all the eggs do not get fertilized and develop into new individuals.

This is because the eggs get exposed to water movement, wind and rainfall. Also, there are other animals in the pond which may feed on eggs.

Thus, production of large number of eggs is necessary to ensure fertilization of at least a few of them.

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