A-LevelBiologyTransport in plantsFeb/Mar 2016Paper 1 Q261 Mark
The diagram shows the results of an experiment using leaves with the same surface area from two different species of plant. Each leaf was left on a balance in daylight in a closed room and its mass recorded at 1 hour intervals. Which features of leaf 2 could explain these results? 1 more stomata per unit area of leaf 2 fewer trichomes (hairs) on the leaf 3 sunken stomata 4 thinner cuticle [Figure 26.1]
A1, 2 and 3
B1, 2 and 4
C1 and 4 only
D2 and 3 only
✓ Correct Answer
The correct answer is B: 1, 2 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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