Question

In bony fishes and frogs external fertilization occur. Pointout any one advantage and one disadvantage ofthis type of gametic fusion

Answer 1

advantage-many eggs are fertilised at a time
disadvantage- many eggs or sperms gets waste

Answer 2

In external fertilization, a large number of gametes are produced by the males and female animals.

Males are required to produce a large number of sperms whereas females are required to deposit hundreds of eggs to ensure reproductive success.

The advantage here is that it may result in a large generation of offspring and the disadvantage is that a number of sperms may be wasted in the process.