Question

PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!

In a certain area, mosquitoes that are resistant to the pesticide DDT now exist in greater numbers than 10 years ago. What is the best explanation for the increase in their numbers?

A
Genetic differences permitted some mosquitoes to become immune to DDT.

B
DDT was extremely harmful to the predators of mosquitoes.

C
DDT killed only the weak in the previous generations of mosquitoes.

D
Mosquito eggs were most likely to have been fertilized when exposed to DDT.

Answer 1

A.)

Genetic differences permitted some mosquitoes to become immune to DDT.

Step-by-step explanation:

DDT-resistant mosquitoes were first detected in India in 1959, and they have increased so rapidly that when a local spray program is begun now, most mosquitoes become resistant in a matter of months rather than years.

Hope this helps you out : )