Question

Mention the disadvantages of external fertilization.

Answer 1

1. A large number of gametes are wasted as fertilization occurs outside the body in an uncontrolled environment.
2. Offspring produced are highly vulnerable to predators, reducing their chances of survival.
3. Gametes and zygotes are exposed to environmental hazards such as changes in temperature, water currents, or pollution.
4. There is less chance of fertilization success due to dilution of gametes in the external environment.