Question

defferertate between internal fertilization and external fertilization

Answer 1

Internal fertilisation:
1. It takes place inside the mother's body.
2. It occurs in viviparous animals.
3. The offspring is protected from the outside world.
4.The chances of the survival of the offspring is quite high.
5. The offspring is generally lesser in np. like 1 or 2.
6. Example : Human beings , dogs , cats etc.

External Fertilisation:
1. It takes place outside the body of the female/mother.
2. It generally occurs in oviparous animals.
3.The offspring is not protected from the outside world .
4. The chances of the survival of the offspring is quite less.
5. The offsprings are produced in a large no.
6. Example : frogs

Answer 2

(1) Internal fertilisation-

   Fusion of gametes occurs outside the body of oraganism

   e.g., pisces, amphibians, etc.

(2) External fertilisation-

   Fusion of gametes occurs inside the body of organism (female)

   e.g., reptiles, aves, mammals, etc.