APFIVE Natural Selection and Antibiotic Resistance
After exposing a bacterial population to an antibiotic, a researcher finds that the surviving bacteria produce resistant offspring. This observation best supports which statement about natural selection?
A
Horizontal gene transfer is the primary mechanism of evolution
B
Selection acts on existing variation, not induced traits
C
Bacteria evolve resistance in direct response to antibiotics
D
Beneficial mutations occur more frequently in stressful conditions
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