Question

Why do female frogs (or female fish) lay hundreds of eggs?

Answer 1

Answer:

female frog or female fish lay hundred of eggs because the chance the sperm will fertilise the egg in low in water as it is external fertilization.Only 5 to 10 have survival chance

Answer 2

Female frogs (or female fish) lay hundreds of eggs to ensure atleast few of them are fertilised.

Explanation:

• Frogs and fishes undergo external fertilisation. It is a process of fusion of male gamete and female gamete.
• When these animals release eggs into environment then most of eggs are destroyed by wind, water movement and rainfall.
• Some of the eggs and sperms are fertilised and forms zygote. Some of the predators feed on eggs.
• This reduces the probability of formation and survival of egg greatly.
• Thus, external fertilisation is a chance factor and it depends on the environment where the eggs are laid.