O-LevelBiologyEcology & Environment5090/11 · May/June 2024 · Q391 Mark

The diagrams show what happens to rain when it falls on an area of forested land before and after houses are built. [Figure 39.1] What is the difference in the percentage of surface runoff before and after building the houses?

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Aincreases by 33%

Bincreases by 43%

Cdecreases to 43%

Ddecreases to 33%

✓ Correct answer

A: increases by 33%

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2024 Paper 1 Variant 1, question 39.

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