Question

why do fish and frog lay more eggs .where as cow and human beings usually give birth to only one at atime

Answer 1

Fish and frog reproduce through asexual reproduction so they lay more eggs.if some eggs are eaten by the predators the other can survive .if they are washed away in water the other eggs can survive.it does have protection from external factors so frogs and fish lay more eggs.human,cow reproduce sexually and the eggs have protection from predators and external factors.so they give birth to one at a time

Answer 2

Human beings lay 1 egg or ovum in one month. When one sperm fuses with the sperm. Thus, humans give birth to one baby at a time.