O-LevelBiologyEcology & Environment5090/12 · Oct/Nov 2019 · Q321 Mark

The diagram shows the origins of a type of pollutant entering an ocean bay. [Figure 32.1] What identifies the type of pollutant?

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.

Acarbon dioxide

Binsecticides

Cmethane

Dnitrogen-containing chemicals

✓ Correct answer

D: nitrogen-containing chemicals

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.

Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2019 Paper 1 Variant 2, question 32.

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