O-LevelBiologyEcology & Environment5090/11 · May/June 2011 · Q251 Mark

The graph shows the relationship between the average age at death and the number of cigarettes smoked per day. Which conclusion from the graph is correct?

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AMost people living longer than 74 years are non-smokers.

BPeople smoking five cigarettes a day live longer on average than those smoking 15 cigarettes a day.

CThe average length of life of people who smoke is 4.5 years less than that of non-smokers.

DThe main cause of death in people who smoke 30 cigarettes a day is lung cancer.

✓ Correct answer

B: People smoking five cigarettes a day live longer on average than those smoking 15 cigarettes a day.

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2011 Paper 1 Variant 1, question 25.

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