DDT is a chemical that is sprayed to lower the population of mosquitos in an effort to reduce the risk of certain diseases. Due to genetic variation in the mosquito population, a few are resistant to DDT and survive.

Question

DDT is a chemical that is sprayed to lower the population of mosquitos in an effort to reduce the risk of certain diseases. Due to genetic variation in the mosquito population, a few are resistant to DDT and survive.
What will be the future impact on the mosquito population after years of DDT use?
A
increase in the number of mosquitoes that are sensitive to DDT
B
increase in the number of mosquitoes that are resistant to DDT
C
increase in the number of mosquitoes that can be used to treat diseases
D
increase in the number of mosquitoes that can withstand all types of chemicals

GPT 3.5 · Answer

B
increase in the number of mosquitoes that are resistant to DDT

Over time, continued use of DDT will select for mosquitoes that are resistant to the chemical. This will result in an increase in the number of mosquitoes that are able to survive exposure to DDT, ultimately reducing the effectiveness of DDT in controlling mosquito populations.