O-LevelBiologyCoordination & Response5090/12 · Oct/Nov 2021 · Q251 Mark

In an experiment, a person tested their reactions by measuring the time taken to catch a ruler that was dropped by another person. They then repeated the test some time after drinking alcohol. Which graph shows their results?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

AGraph A with initial lower dots, then higher dots after the change.

BGraph B with initial lower dots, then distinctly higher dots after the change.

CGraph C with initial higher dots, then lower dots after the change.

DGraph D with initial dots, then similar level dots after the change.

✓ Correct answer

A: Graph A with initial lower dots, then higher dots after the change.

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2021 Paper 1 Variant 2, question 25.

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