A-LevelBiologyTransport in plantsOct/Nov 2010Paper 1 Q231 Mark
Which processes are involved in transpiration? 1 the diffusion of water vapour from stomata 2 the mass flow of water through the xylem 3 the evaporation of water from spongy mesophyll cells 4 the evaporation of water vapour from exposed leaves
A1, 2, 3 and 4
B1 and 3 only
C1 and 4 only
D2, 3 and 4 only
✓ Correct Answer
The correct answer is A: 1, 2, 3 and 4
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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