O-LevelBiologyEcology & Environment5090/11 · May/June 2016 · Q251 Mark

The graphs show changes in the percentage of smokers and number of lung cancer deaths in a country between 1950 and 2000. [Figure 25.1] What could have caused the change in the number of deaths from lung cancer between 1950 and 1975?

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Ahigher percentage of smokers after 1950

Bhigher percentage of smokers before 1950

Clower percentage of smokers after 1950

Dlower percentage of smokers before 1950

✓ Correct answer

B: higher percentage of smokers before 1950

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2016 Paper 1 Variant 1, question 25.

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