O-LevelBiologyEcology & Environment5090/12 · May/June 2023 · Q371 Mark

The diagram shows four ecological pyramids. [Figure 37.1] In a food chain, grass is eaten by cows. The cows have insects living on their skin. The insects are eaten by birds. Which is the pyramid of biomass and which is the pyramid of numbers in this food chain?

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Apyramid of biomass: 1, pyramid of numbers: 3

Bpyramid of biomass: 1, pyramid of numbers: 4

Cpyramid of biomass: 3, pyramid of numbers: 1

Dpyramid of biomass: 3, pyramid of numbers: 2

✓ Correct answer

A: pyramid of biomass: 1, pyramid of numbers: 3

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2023 Paper 1 Variant 2, question 37.

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