Question

Explain the advantages and disadvantages of external fertilization.

Answer 1

When both the sperm and egg are released into the external environment and then fertilization takes place, it is known as external fertilization. Advantages of external fertilization include the benefit of a large number of offspring. Also, it is easier to find mates as the gametes just need to be released and can drift away with wind or water. This results in greater genetic variation. The disadvantages however, are that there is reduced chance of survival from predators and harsh environments. Large number of unfertilized gametes will be wasted and there is higher rate of desiccation of the gametes.