The ability of a species, over time, to become less susceptible to the
effects of pesticides is called
A. resistance
B. bioaccumulation
C. persistence
D. biomagnification

Thus, pesticide resistance is the natural ability of a biotype of an organism to survive exposure to a pesticide that would normally kill an individual of that species.

!! ⬇️

Over time many pesticides have gradually lost their effectiveness because pests have developed resistance – a significant decrease in sensitivity to a pesticide, which reduces the field performance of these pesticides. EPA is concerned about resistance issues.

Pesticide resistance is an example of natural selection because the insects who survive the initial use due to a gene that enable them to resist the attack pass on the gene for pesticide resistance to their offspring. ... The pesticides become less and less effective every year because organisms adapt to them.