Difference between Internal and External fertilization
No. |
Internal fertilization |
External fertilization |
1. | The fertilization which takes place inside reproductive tract of the female and found in terrestrial vertebrates, this is known as Internal fertilization. | A type of fertilization which takes place outside the female body in water and mostly found in aquatic animals, this is known as External fertilization. |
2. | Water is not required in the Internal type of fertilisation. | Water is required in the external type of fertilization. |
3. | Survival rate of the embryo in internal fertilization is generally high. | Survival rate of the embryo in external fertilization is generally low. |
4. | Small numbers of eggs are produced in the internal fertilization. | Large numbers of eggs are produced in the external fertilization. |
5. | Internal fertilization mainly takes place in the animals which lives on land. | External fertilization mainly takes place in the organisms which lives in water. |
6. | Following are the organisms which show internal fertilization: birds, mammals, humans, horse, and reptiles etc. | Following are organisms which show external fertilization: hydra, fish and frog etc. |