A-LevelBiologyGas exchangeOct/Nov 2024Paper 1 Q331 Mark
Which row shows the features of the gas exchange surface that increase diffusion of carbon dioxide and oxygen?
Aconcentration gradient: steep, diffusion distance: long
Bconcentration gradient: steep, diffusion distance: short
Cconcentration gradient: shallow, diffusion distance: long
Dconcentration gradient: shallow, diffusion distance: short
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of gas exchange 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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