Certain weeds have become resistant to the pesticides that were used to kill them. Which of the following statements is the best explanation for this phenomenon?
A) The weeds have become different species.
B) The pesticides evolved so that they are no longer useful against the weeds.
C) Continental drift caused the evolution of weed resistance in the pesticides.
D) Natural selection acted on the genetic variability present in the weeds' genomes.
Correct Answer:
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