Why hen lays one egg whereas fish and frog lays 100 eggs?

Answer 1

For the same reason that fish, insects and Spiders etc also lay large quantities of eggs. To ensure the survival of some of their offspring. The eggs and young are usually left unprotected and many will perish, by laying large quantities some are likely to survive and reach maturity.

Answer 2

A chicken lays one per day, so per year it lays about 365, give or take a few.
A fish or frog only lays once, maybe twice, a year, and lays hundreds in one go.
So per year, they lay about the same amount.

Answer

Fish generally produce thousands or millions of eggs. But 99.999% are eaten by various predators in the sea. [The number of 9's varies!] Birds in general produce only a few eggs at a time but success rates may be more like 10% surviving to maturity.

Answer 3

chickens are larger they cant produce that many. also hens raise their young so they have a highersurvivalrate where frogs just lay the eggs and and leave same goes for fish and only a small % of them will make it to sexual maturity

Answer 4

Both fish and amphibians normally lay a large number of eggs. This is a survival strategy. Because the odds of any single offspring surviving long enough to reproduce are low. By laying a lot of eggs, they increase the odds that a few will survive.

Answer 5

The young that hatch from the eggs of fish and frogs have a very low survival rate. Very few will live to become adults and many of those that do will still fail to have offspring of their own. In order to maintain a stable population these animals must lay dozens if not hundreds of eggs at a time so that at least some of their offspring will survive to adulthood.