Final answer:
A characteristic of evolved bedbugs is resistance to the effects of certain pesticides due to natural selection, where resistant individuals survive and pass on their traits, resulting in a population that is less affected by the pesticide.
Step-by-step explanation:
A characteristic of bedbugs that have evolved to become resistant to certain pesticides is D) Resistance to the effects of certain pesticides. This is an example of pesticide resistance, which occurs when a pest population's susceptibility to a pesticide they were previously controlled by decreases. The process involves natural selection, where only the most resistant individuals survive to reproduce and pass on their resistance to their offspring.
When a pesticide is used extensively, the few pests with natural or mutated resistance will survive and reproduce. Over time, these resistant traits become more common in the population, rendering the pesticide less effective. This microevolution does not create a new species but alters the gene frequency within the population.