Differentiate between external fertilization and internal fertilization giving example.

Explanation

External fertilization :
The fusion of male and female gametes takes place outside the female body.
The chances of fertilization is less.
The organisms release more number of gametes into the external medium.
The off springs are vulnerable to the predators.
Ex : Bony fishes and amphibians.
Internal fertilization :
The fusion of male and female gametes inside the body of female organism is called internal fertilization.
The chances of fertilization is more.
Male organism produces more number of sperms and female produce lesser number of eggs.
The offsprings are highly protected.
Ex : In higher forms like reptiles, birds, mammals.