The photomicrograph shows some xerophytic adaptations in leaf tissue. [Figure 25.1] Which row shows the correct functions for structures 1, 2 and 3?
✓ Correct Answer
The correct answer is B: reduces the water vapour concentration gradient between the inside and outside of the leaf: 1 and 2 only, reduces evaporation from the epidermis of the leaf: 1, 2 and 3, traps a layer of moist air: 1 and 2
📋 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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