In a certain area, mosquitoes that can resist the effects of pesticides (insect-killing chemicals) now exist in greater numbers than10 years ago. what is the most probable explanation for this increase in numbers? select one: mosquito eggs were most likely to have been fertilized when exposed to the pesticides. the pesticides acted as a repoductive hormone for previous generations of mosquitoes. the pesticides serve as a new source of nutrition. genetic differences permitted some mosquitoes to survive the use of the pesticides.