Question

Select the incorrect statement about external fertilisation.

• A. Organisms showing external fertilisation produce a large number of male gametes only
• B. External fertilisation is very uncertain and requires synchrony 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 1

Answer: (A)

Organisms showing external fertilisation produce a large number of male gametes only

Answer 2

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