A new and effective antibiotic becomes widely used for a particular species of bacteria. After some time, an antibiotic–resistant strain of the bacteria becomes prevalent. Which mechanism explains this phenomenon?

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aaronq · Answer

@rarecigs i don't see how copying and pasting from elsewhere (see link below) not addressing the question solves anything.The question is asking you to provide the $evolutionary$ mechanism at play here. If you kept on reading, the next paragraph describes this. http://www.tufts.edu/med/apua/about_issue/about_antibioticres.shtml