Question

Reshma was listening to her grandmother talk about the good old days when everything was much simpler. "Did you know? We did not have all these mosquito repellants back then. We used to protect ourselves by using mosquito nets. Over the years, even the repellants have gotten less effective because the mosquitoes are getting harder to kill". Reshma wondered how the mosquitoes were able to adapt themselves to the harmful chemicals. Why do you think this has happened?

• A. Mosquitoes have adapted themselves, with changes occurring in their genes.
• B. Reshma has been using cockroach spray to kill mosquitoes.
• C. Mosquitoes have taken on human characteristics.
• D. Humans do not like killing mosquitoes.

Answer 1

The correct option is A Mosquitoes have adapted themselves, with changes occurring in their genes.

Mosquitoes have adapted themselves by changing their genes, to increase their resistance to mosquito-killing sprays. This is why we are finding it harder to find newer, stronger chemical sprays to get rid of them. This is an example of survival of the fittest.