O-LevelBiologyEcology & Environment5090/11 · Oct/Nov 2025 · Q31 Mark

A student draws six different arthropods found in woodland. [Figure 3.1] When constructing a dichotomous key, which question could be used to separate arthropods 2, 5 and 6 from arthropods 1, 3 and 4?

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ADoes it have a segmented body?

BDoes it have antennae?

CDoes it have six legs?

DDoes it have wings?

✓ Correct answer

C: Does it have six legs?

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2025 Paper 1 Variant 1, question 3.

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