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O-LevelBiologyEcology & Environment5090/11 · Oct/Nov 2016 · Q321 Mark

Which of the following, when disposed of, affects a river ecosystem for the shortest time?

Afertilisers
Bhot water
Cinsecticides
Dsewage

✓ Correct answer

B: hot water

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About this question

Topic
Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2016 Paper 1 Variant 1, question 32.

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