O-LevelBiologyEcology & Environment5090/12 · May/June 2020 · Q321 Mark

Which pollutants may be released by agricultural practices?

Ainsecticides: yes, methane: yes, fertiliser: yes, sulfur dioxide: no

Binsecticides: yes, methane: yes, fertiliser: no, sulfur dioxide: yes

Cinsecticides: yes, methane: no, fertiliser: yes, sulfur dioxide: yes

Dinsecticides: no, methane: yes, fertiliser: yes, sulfur dioxide: yes

✓ Correct answer

A: insecticides: yes, methane: yes, fertiliser: yes, sulfur dioxide: no

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2020 Paper 1 Variant 2, question 32.

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