Question

Why do fish and frog lay eggs in hundreds.Whereas a hen lays only egg at atime?

Answer 1

Here is your answer:

#fishes and Frogs undergl external fertilisation so they release their gametes in water.. Since in water there are more unfavourable conditions like predators , dispersion of gametes in other directions etc...

It overcomes by laying more eggs

#Hen undergoes internal fertilization

So lays only one egg which is completely safe since it develops insided the hen

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