Select the incorrect statement about external fertilisation.

Options

A. Organisms showing external fertilisation produce a large number of male gametes only.
B. External fertilisation is very uncertain and requires synchony between release of male and female gametes.
C. It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.
D. It occurs in most of the fishes and amphibians.

Answer

a

Explanation

When fertilisation occurs outside the body of the organism, this type of gametic fusion is called external fertillisation or external syngamy. Organisms exhibiting external fertillisation produce a large number of both male and female gametes to enhance the chances of fertilisation e.g., algae, fish and amphibians.