External Fertilization : When the fusion of male and female gametes takes place outside the body of an organism, it is called external fertilization.
Example : Frog
Internal Fertilization : When the fusion of male and female gametes takes place inside the body of female organism is called internal fertilization.
Example : Goat.
Disadvantages of External Fertilization :
- It requires a medium for fusion of gametes.
- It is not ensured and there are chances of wastage and distinction of gametes.
- The young ones are often exposed to predators and no parental care is provided.
