O-LevelBiologyCoordination & Response5090/12 · May/June 2020 · Q241 Mark

The diagram shows the bones of the human forearm. [Figure 24.1] What are the bones X and Y?

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AX: humerus Y: radius

BX: humerus Y: ulna

CX: scapula Y: radius

DX: scapula Y: ulna

✓ Correct answer

D: X: scapula Y: ulna

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2020 Paper 1 Variant 2, question 24.

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