O-LevelBiologyEcology & Environment5090/11 · May/June 2017 · Q291 Mark

The diagram shows a food chain. tree → mice → cats → fleas What is the shape of the pyramid of numbers for this food chain?

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APyramid with a wide base and gradually narrowing tiers upwards.

BPyramid with a wide base, a narrow second tier, and a wider third tier.

CPyramid with a narrow base, a wide second tier, and a narrower third tier.

DPyramid with a narrow base, a wider second tier, and an even wider third tier.

✓ Correct answer

D: Pyramid with a narrow base, a wider second tier, and an even wider third tier.

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2017 Paper 1 Variant 1, question 29.

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