What is not a disadvantage of internal fertilization?
a. the ability to reproduce on land without needing external water
b. the need for more specialized reproductive structures
c. the reduction in the randomness of fertilization (less genetic variability in offspring)
d. the production of fewer embryos

The ability to reproduce on land without needing external water. (Ans. A)

Explanation:

Internal fertilization is defined as the process where, sperm is fertilizing the egg within the female reproductive tract. Internal fertilization helping in to protects the fertilized embryo from harsh environment, predation, and they are able to reproduce on land without any need of external water, which results as higher survival rates.

This fertilization includes 3 main methods for fertilization:

1) Oviparity: In this fertilization eggs are placed outside the female body and nourishment of embryo comes from the yolk which is a part of the egg.

2) Ovoviparity: In this process eggs held within female and nourishment is comes from the yolk.

3) Viviparity: In this process development of embryo occurs within female followed by live birth and nourishment is received directly from the mother with the help of placenta.

In internal fertilization, fertilized eggs are protecting from dehydration on land this is the advantage of this method of fertilization.

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