O-LevelBiologyEcology & Environment5090/12 · May/June 2021 · Q301 Mark

The diagram shows part of the carbon cycle. [Figure 30.1] What do X, Y and Z represent?

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Acombustion respiration ingestion

Bcombustion ingestion respiration

Cphotosynthesis respiration combustion

Dphotosynthesis combustion respiration

✓ Correct answer

C: photosynthesis respiration combustion

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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 2, question 30.

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