APFIVE Natural Selection and Antibiotic Resistance
A researcher studying antibiotic resistance observes that after exposure to an antibiotic, surviving bacteria produce offspring with the same resistance. This observation supports which concept about natural selection?
A
Beneficial mutations occur more frequently in stressful conditions
B
Selection acts on existing variation, not induced traits
C
Bacteria evolve resistance in direct response to antibiotics
D
Horizontal gene transfer is the primary mechanism of evolution
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