When a Farmer Grows Cotton Containing the Gene for Bt

Multiple Choice

When a farmer grows cotton containing the gene for Bt toxin,insects that are resistant (rr) survive and reproduce.These insects were resistant because:

A) They already had alleles that made them resistant
B) The insecticide caused mutations to generate resistant alleles
C) The insects wanted to survive the insecticide and mutated their DNA
D) By random chance some insects did not die from the insecticide
E) The insects were able to produce gametes that were resistant to the insecticide