21. Evolution by Natural Selection
Descent with Modification
Multiple Choice
Multiple ChoiceHow did some strains of Staphylococcus aureus become resistant to antibiotic drugs?
A
The drug did not work in the way that the developers intended.
B
Patients did not take the drug as it was prescribed.
C
The bacterium mutated in response to the drug.
D
None of the listed responses is correct.
E
Some members of the bacteria population must have had genetic variation that made them resistant to antibiotics, and these bacteria had greater reproductive success than sensitive individuals.
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