O-LevelBiologyEcology & Environment5090/11 · May/June 2020 · Q301 Mark

The diagram shows parts of the nitrogen cycle. [Figure 30.1]. Which arrow represents the action of the root nodule bacteria of leguminous plants?

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Aarrow from nitrogen gas to nitrogen-containing green plants

Barrow from decaying remains to ammonia and ammonium compounds

Carrow from nitrites to nitrates

Darrow from nitrogen-containing green plants to decaying remains

✓ Correct answer

A: arrow from nitrogen gas to nitrogen-containing green plants

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2020 Paper 1 Variant 1, question 30.

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