O-LevelBiologyCoordination & Response5090/12 · May/June 2023 · Q251 Mark

The graph shows changes in the diameter of a person's pupils while outdoors on a sunny day. [Figure 25.1] At which time did the person take off their sunglasses?

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ATime A

BTime B

CTime C

DTime D

✓ Correct answer

C: Time C

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2023 Paper 1 Variant 2, question 25.

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