Question

3. Why do fish and frog lay more number of eggs where as cow and human beings
usually give birth to only one at a time? (ASI)​

Answer 1

Answer:

As the chance of fertilization is nature dependant i.e it depends on the movement of water for the sperm to come in contact with the egg. Thus the fish and frog produce a huge number of eggs each year to overcome the chance factor(sperm to come in contact with egg) and produce offsprings.

Answer 2

Answer:

why do fish and frog lay more number of eggs where as cow and human biengs usually give birth to only one at a time. ... So, their large numbers enables adequate number of eggs to get fertilized even if some eggs are destroyed. In case of humans and others, the process of fertilization occurs inside the body.

Explanation:

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