Skip to main content
O-LevelBiologyEcology & Environment5090/11 · May/June 2023 · Q381 Mark

The diagram shows part of the carbon cycle. Which row shows the correct labels for the numbered boxes?

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.

A1: plants, 2: the air, 3: decomposers, 4: animals
B1: the air, 2: plants, 3: decomposers, 4: animals
C1: plants, 2: the air, 3: animals, 4: decomposers
D1: the air, 2: plants, 3: animals, 4: decomposers

✓ Correct answer

D: 1: the air, 2: plants, 3: animals, 4: decomposers

Practise more questions on this topic

Oracle Prep sorts past-paper questions by topic, so you can drill Ecology & Environment and see which topics are most likely to come up next.

Sign up free →

About this question

Topic
Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2023 Paper 1 Variant 1, question 38.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Related Biology questions

© 2026 Oracle Prep