A farmer observes that increasingly higher concentrations of a particular pesticide have been required each year over the past ten years to achieve the same level of effectiveness on a specific insect pest. Which of the following best helps explain the observation?
A) Some individual insects live longer that others and pass on traits acquired during their lives.B) Only the most aggressive and territorial insects survive and reproduce.C) Some individual insects are more likely than others to survive and reproduce due to their inherited traits.D) Some individual insects reproduce before the pesticide is applied, thereby avoiding its harmful effects.

Insects are known for their ability to develop resistance to insecticides. Currently there are insects resistant to every synthetic chemical insecticide used. There are many factors to developing resistance, for example:

many insects species produce large broods. This increases the probability of mutations and ensures the rapid expansion of resistant populations.
Insects with shorter life times develop resistance more quickly than others because its genetics make them reproduce much faster.
insects with limited diets are more likely to evolve resistance, because they are exposed to higher pesticide concentrations and has less opportunity to breed with unexposed populations.

But this kind of phenomenon has not only observed in insects in England, rats in certain areas have evolved resistance that allows them to consume up to five times as much rat poison as normal rats without dying.

sohail09753 sohail09753 · Answer 2 · 2021-11-15T12:41:40+01:00

Pesticides are those form of compund chemicals those are used to kill the pests. These pests provide harm to the cultivation of plants or even they can harm farm animals.

The observation of the farmer is best described in the following statement:

Option C. Some individual insects are more likely than others to survive and reproduce due to their inherited traits.

Reason:

The reason for some insects to most likely survive even after pesticides is because there are various species of insects who can resist the chemical insecticide.

The only reason for such insects is that they produce large broods that help them to increase the probability of mutations and also ensure the rapid expansion of resistant pests.

Although such pests are not found all over the globe they are been observed only in a certain area that has evolved the resistance that allows such insects to consume five times more than the normal breeds.

The other options are incorrect because the reasons for reproduction, live long traits, and all are not appropriate for the given case.

Therefore, option C is correct for the given observation of the farmer.

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