| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.SL.TZ2.22 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Identify | Question number | 22 | Adapted from | N/A |
Question
What type of process causes antibiotic resistance to develop in bacteria?
A. Competition with viruses
B. Overproduction of offspring
C. Evolution due to environmental change
D. Response by bacteria to an epidemic
Markscheme
C
Examiners report
G2 comments thought that the term natural selection should have been used in the question, rather than evolution. However, it was felt that use of antibiotics could not be called natural selection. Most candidates gave the correct response of C, although a large number did choose D.
Syllabus sections
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