Why do fish and
frogs lay eggs in
hundreds whereas a
hen lays only one
egg at a time?
Answers
Answer:
Frogs and fish mostly lay their eggs in water; larvae produced by them could flow along with water so to protect their generation they have to lay thousands of eggs at a time while hens lay eggs on land, so they do not need to lay many eggs.
Answer:
In animals such as frogs and fishes, the process of fertilization takes place outside the body.
Aquatic organisms who shows external mode of reproduction have to lay egg in hundreds. The first reason behind this is the single egg is so small in size that it will not be possible to stay to definite position and which in turns make hard for sperms to find and fertilize them. Whereas, when large number of eggs make them stick together this makes fertilization possible. Another reason behind this is there are a lot of organisms who feed on these eggs, so larger number of eggs gives more possibility of giving birth to young ones.