How Does a Population of Pathogens Become Resistant to a Drug

question 61

Multiple Choice

How does a population of pathogens become resistant to a drug?

• A) Natural selection: the drug selects against the most resistant.
• B) Evolution: a mutation occurs as a result of exposure to the drug
• C) A lucky mutation
• D) Natural selection: some are resistant to start, and those survive and reproduce.
• E) A few become resistant at first exposure, and they survive and reproduce.

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