Question

How can we say that fish exhibits external fertilization?

Answer 1

External fertilization in fish:

1. External fertilization is the process where the fusion of male and female gametes occurs in the outside environment.
2. The female fish lays its eggs in the surrounding water environment and the male sperm travels towards the egg randomly in the water.
3. The nucleus of the sperm moves into the egg and fuses with it.
4. Due to water as the external environment the female eggs do not dry out in case of external fertilization.
5. Since fertilisation occurs in water, outside the female body, it is external fertilisation.
6. Hence, because of the above-mentioned reasons we can say that fish exhibit external fertilization.