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O-LevelBiologyEcology & Environment5090/11 · Oct/Nov 2015 · Q301 Mark

The diagram shows some stages in the nitrogen cycle. Which arrow represents the action of nitrogen-fixing bacteria?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A[Arrow A]
B[Arrow B]
C[Arrow C]
D[Arrow D]

✓ Correct answer

D: [Arrow D]

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About this question

Topic
Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2015 Paper 1 Variant 1, question 30.

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