試題詳解

25. DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Which of these would have been required for this pest eradication effort to be successful in the long run?
(A) The frequency of DDT application should have been higher.
(B) None of the individual insects should have possessed genomes that made them resistant to DDT.
(C) DDT application should have been continual.
(D) All habitats should have received applications of DDT at about the same time.
(E) Larger doses of DDT should have been applied.