O-LevelBiologyCoordination & Response5090/11 · Oct/Nov 2025 · Q261 Mark

The diagram shows a plant grown on its side without light. [Figure 26.1] Which row explains the responses shown by the roots and the shoot?

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Aroots: positive gravitropism, shoot: positive phototropism

Broots: negative phototropism, shoot: positive phototropism

Croots: positive gravitropism, shoot: negative gravitropism

Droots: negative gravitropism, shoot: positive gravitropism

✓ Correct answer

C: roots: positive gravitropism, shoot: negative gravitropism

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2025 Paper 1 Variant 1, question 26.

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