Question 27 After many years of applying the selective pesticide provironex, a f

Question

Question 27 After many years of applying the selective pesticide provironex, a farmer notices that the applications seem less effective. This is likely due to A. the fact that provironex is fat soluble and has been bioaccumulating. B. provironex is persistent, and the farmer should apply less for better results. C. the target species has begun to evolve resistance. D. provironex is a wide-spectrum pesticide that needs to be fine-tuned for the target species. E. provironex is selective, so other pests are filling the niche from the exterminated ones.

Explanation / Answer

Answer is option C. The target species has begun to evolve resistance. Repeated use of the same class of pesticides to control a pest can cause undesirable changes in the gene pool of a pest leading to another form of artificial selection.Pest species evolve pesticide resistance via natural selection: the most resistant specimens survive and pass on their genetic traits to their offspring.Through this process of selection, the population gradually develops resistance to the pesticide

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