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O-LevelBiologyEcology & Environment5090/11 · May/June 2017 · Q301 Mark

The diagram shows part of the nitrogen cycle. Which process occurs at X?

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.

Adecomposition
Bdenitrification
Cnitrification
Dnitrogen fixation

✓ Correct answer

D: nitrogen fixation

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About this question

Topic
Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2017 Paper 1 Variant 1, question 30.

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