O-LevelBiologyCoordination & Response5090/12 · May/June 2015 · Q221 Mark

An antelope is grazing under a tree. It hears men shouting in the distance. Which changes take place in the antelope's eyes as it raises its head to look at the men?

Acontract, become taut, become more convex

Bcontract, become slack, become less convex

Crelax, become taut, become less convex

Drelax, become slack, become more convex

✓ Correct answer

C: relax, become taut, become less convex

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2015 Paper 1 Variant 2, question 22.

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