Question

why fo fish or frogs lay eggs in hundreds where as hen lay only one egg at a time?​

Answer 1

Answer:

as frog and fish live in water if the water flows away the eggs flow as they are lighter so they lay eggs in hundreds but bird as hen live on land so they can lay one egg and take care of it

Answer 2

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Though these animals lay hundreds of eggs and release millions of sperms, all the eggs do not get fertilized and develop into new individuals. This is because the eggs and sperms 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 and sperms is necessary to ensure fertilization of at least a few of them.