Question

what term is used to describe the ability of a species to become less susceptible to the effects of a pesticide over time?

tolerance

resistance

Explanation:

In the context of pests and pesticides (or similar scenarios in biology), "resistance" refers to the ability of a species (like pests) to become less susceptible to the effects of a pesticide over time. "Tolerance" can have a different connotation, often related to the ability to endure a substance but not specifically the reduced susceptibility to its effects in the same biological resistance sense. So the correct term here is Resistance.

Answer:

Resistance