Fertilisation:
Fertilisation in animals takes place in two ways. They are: External fertilization and Internal fertilization
External fertilisation:
- It takes place outside the animal’s body.
- It usually takes place in aquatic environments where both eggs and sperm are released into the water.
Fertilization in frogs and fish takes place by this method.
Internal fertilisation:
- Fertilization takes place inside the. animal’s body.
- Internal fertilization takes place in animals like cats, dogs, cows, etc.