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O-LevelBiologyCoordination & Response5090/11 · May/June 2023 · Q251 Mark

The diameter of a person's pupil is measured as the light intensity is varied. During which time period does the light intensity increase fastest?

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AA

BB

CC

DD

✓ Correct answer

D: D

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About this question

Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2023 Paper 1 Variant 1, question 25.

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