O-LevelBiologyEcology & Environment5090/12 · Oct/Nov 2016 · Q301 Mark

In which process is atmospheric nitrogen absorbed in root nodules and combined with other compounds?

Anitrification

Bnitrogen fixation

Cputrefaction

Ddiffusion

✓ Correct answer

B: nitrogen fixation

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2016 Paper 1 Variant 2, question 30.

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