A-LevelBiologySelection and evolution9700/12 · May/June 2021 · Q371 Mark

What has contributed to the increase in antibiotic resistance in bacteria? 1 increased use of vaccines for animal diseases 2 mutations in bacterial DNA 3 patients not completing their antibiotic treatment

A1, 2 and 3

B1 and 2 only

C1 and 3 only

D2 and 3 only

✓ Correct answer

D: 2 and 3 only

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Topic: Selection and evolution, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2021 Paper 1 Variant 2, question 37.

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