Within six months of effectively using methicillin to treatS. aureus infections in a community, all new S. aureus infectionswere caused by MRSA. How can this best be explained?(A) A patient must have become infected with MRSA fromanother community.(B) In response to the drug, S. aureus began making drugresistant versions of the protein targeted by the drug.(C) Some drug-resistant bacteria were present at the startof treatment, and natural selection increased theirfrequency.(D) S. aureus evolved to resist vaccines

Within six months of effectively using methicillin to treatS. aureus infections in a community, all new S. aureus infectionswere caused by MRSA. How can this best be explained?(A) A patient must have become infected with MRSA fromanother community.(B) In response to the drug, S. aureus began making drugresistant versions of the protein targeted by the drug.(C) Some drug-resistant bacteria were present at the startof treatment, and natural selection increased theirfrequency.(D) S. aureus evolved to resist vaccines

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter11: Genome Alterations: Mutation And Epigenetics

Section11.4: Mutations Can Be Spontaneous Or Induced

Problem 1EG: Consumer products including bandages, cotton balls, diapers, and contact lens solutions are...

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