Question:

Select the incorrect statement about external fertilisation.

Updated On: Jul 7, 2022

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

Hide Solution

Verified By Collegedunia

The Correct Option is A

Solution and Explanation

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.

Was this answer helpful?

Notes on Fertilisation And Implantation

Concepts Used:

Fertilisation

Fertilization happens when a sperm fuses with the female act during sexual intercourse and further forms an egg that gets implanted in the uterus of the female. The sperm goes through the fallopian tube and penetrates the zona pellucida layer of the ovum (female egg) and then fuses with it which forms a zygote (fertilized egg). Thousand of sperms are generated in a male body to compensate for the ones unfit and non-motile ones. Once the zygote is created or formed, it gets implanted in the uterus and further growth starts taking place when cells start dividing and forming tissues, and tissues further form organs which result in the formation of an organ system, eventually or in time turning into an organism.