O-LevelBiologyEcology & Environment5090/12 · May/June 2022 · Q301 Mark

The diagram shows part of the carbon cycle. Which row identifies processes W, X, Y and Z?

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Acombustion, respiration, respiration, photosynthesis

Bcombustion, photosynthesis, photosynthesis, respiration

Crespiration, combustion, respiration, photosynthesis

Drespiration, photosynthesis, combustion, photosynthesis

✓ Correct answer

A: combustion, respiration, respiration, photosynthesis

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2022 Paper 1 Variant 2, question 30.

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