A-LevelBiologyTransport in plantsFeb/Mar 2022Paper 1 Q291 Mark

Which feature of some xerophytic leaves reduces the rate of transpiration by decreasing the water potential gradient between the internal leaf surface and the atmosphere?

Q: What topic does this question test?

This question tests Transport in plants in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Athick waxy cuticle on the upper surface of the leaf

Bleaves reduced to spines with a small surface area to volume ratio

Cstomata located in sunken pits on the leaf surface

Delongated leaves that are swollen storing large amounts of water

✓ Correct Answer

The correct answer is C: stomata located in sunken pits on the leaf surface

📋 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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About This A-Level Biology Question

Topic

This multiple-choice question tests Transport in plants in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology Feb/Mar 2022 examination, Paper 1 Variant 2.

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