Question

Define external fertilisation? Mention its advantages.

Answer 1

Answer:

In external fertilization, eggs have less chances of fertilization. This can lead to the wastage of a large number of eggs produced during the process. Further, there is an absence of proper parental care to the offspring, which results in a low rate of survival in the progenies

Frogs and a number of other animals have an unusual step in their reproductive cycle: a female's eggs are fertilized by the male's sperm externally, that is, in the environment rather than in the animal's body. External fertilization may seem a mite impersonal, but it carries with it several advantages as well as risks. It's behaviorally simple but in a variable environment, the success rate of fertilization is not very high.