Why do fish and frogs lay eggs and release sperm in hundreds whereas a hen lays only one egg at a time?

In fishes and frogs, the eggs get exposed to water movement, wind and rainfall. The chance of fertilisation of the egg increases if a large number of sperms are released. However, in hens, the fertilisation is internal, with higher chances of fertilisation. Therefore, hens lay only one egg at a time.

Why do frogs lay eggs in hundreds Class 8?

Female frogs lay hundreds of eggs because chances of survival of each egg is less. so they lay hundreds of them with an intension of some of them will survive.

Why do frogs lay many eggs?

Frogs laid so many eggs in water to make sure that enough eggs reach to the morality & adulthood . because they are lowers in food chain & also have so may enemies in water & on land also . So to ensure for new generation they laid high number of eggs .

Why does a fish lay thousands of eggs at a time?

fish lays thousands of eggs because some of them are eaten by big animals and some of them don’t get enough Oxygen and some more things that they can’t grow , So fish has to lay many Eggs so that so of them becomes a new one.

Why do fish and frog lay more number of eggs whereas cow and human beings usually give birth to only one at a time?

Fish and frog lay a greater number of eggs at a time because their fertilization is external whereas fertilization in cows and human beings is internal. It protects the fertilized egg from external harsh environment. Survival rate of young ones is higher in internal fertilization.

Why do fish lay eggs in water?

Fish breed in a number of ways. Most fish release thousands of eggs, scattering them in the water where the male fish fertilize them. The eggs develop and hatch into larvae (baby fish) without any help from the parents. This improves the chances of the babies surviving, so fewer eggs are laid.

Why do fish produce so many eggs?

Rather, the rate of predation on fish eggs is high because they produce such a lot of eggs. Many fish produce thousands of minute eggs, each with an infinitesimally small chance of survival because this reproductive strategy in these species results in the highest number surviving to adulthood.

Why do fish lay a lot of eggs?

Why does cow gives a baby but fish or frog give many offspring?

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.

Why do fish lay more eggs than humans?

Fish and Amphibian Reproduction: Fish and amphibians will typically produce more eggs while reproducing than mammals and reptiles. This is due, in part, to the method of egg fertilization during which amphibians and fish fertilize the eggs externally, while mammals and reptiles fertilize eggs internally.

Why do fish and frogs lay eggs in a pond?

Why Do Fish And Frogs Lay Eggs In Hundreds? Animals like frogs and fish lay hundreds of eggs and release millions of sperms. 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.

Do frogs lay eggs or give birth?

Though, fish and frogs lay hundreds of eggs, all of the eggs do not get fertilized. Hence, very few new frogs are produced. Frogs lay sperms in water. Many of the sperms get washed away due to water movement. Thus, egg is not fertilized Even after eggs are fertilized to form larva, they are eaten by other organisms..

Why are there so many gametes in fish and frogs?

(4) Hence in fishes and frogs, the fertilization of male and female gamete is a chance factor and it depends on nature too. So, to increase the chances of fertilization a large number of gametes are produced in these organisms.

Why does a pond need to produce large number of eggs?

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.