O-LevelBiologyEcology & Environment5090/11 · May/June 2021 · Q301 Mark

The diagram shows the movement of carbon in the carbon cycle, in gigatonnes per year. How many gigatonnes of carbon are moved by respiration each year? [Figure 12.1]

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A120

B125

C130

D255

✓ Correct answer

A: 120

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2021 Paper 1 Variant 1, question 30.

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