Question

Select odd one out giving reasons:
Internal fertilization, external fertilization, viviparous animals.

Answer 1

External fertilization:

1. External fertilization refers to fertilization that occurs outside of an organism's body.
2. A water body is usually required for effective fertilization.
3. The sperms and eggs are released into the external environment.

Internal fertilization:

Internal fertilization refers to fertilization that takes place inside the female body.

Viviparous animals:

1. Animals that give birth to young are known as viviparous animals.
2. It is a type of internal fertilization.
3. In vivipary, fertilization and embryo development takes place inside the organism.