A-LevelBiologyTransport in mammalsOct/Nov 2025Paper 1 Q351 Mark
The bar chart shows the mean thickness of the walls of the main chambers in a mammalian heart. [Bar chart showing mean wall thickness /mm for heart chambers P, Q, R, S] Which row correctly identifies the heart chambers?
Aright atrium: R, left atrium: Q, right ventricle: S, left ventricle: P
Bright atrium: Q, left atrium: S, right ventricle: R, left ventricle: P
Cright atrium: R, left atrium: Q, right ventricle: P, left ventricle: S
Dright atrium: Q, left atrium: R, right ventricle: S, left ventricle: P
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of transport in mammals within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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