O-LevelBiologyEcology & Environment5090/11 · May/June 2010 · Q321 Mark

Why is it important to control the amount of nitrate fertiliser used on farm land?

ANitrate causes acid rain which kills trees and fish.

BNitrate decreases the fertility of the soil.

CNitrate may lead to excessive growth of water plants.

DNitrate poisons many kinds of crop plants.

✓ Correct answer

C: Nitrate may lead to excessive growth of water plants.

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2010 Paper 1 Variant 1, question 32.

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