Biology 9700 · AS & A Level · Natural and artificial selection

Natural and artificial selection — practice question

Humans use antibiotics to treat bacterial infections. As antibiotics have been used more widely, the number of bacteria strains resistant to antibiotics has risen. The development of antibiotic resistance in bacteria has been driven by natural selection.
(main)[7]

Describe how bacteria acquire resistance to antibiotics.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “random genetic mutation” …

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