A-LevelBiologyTransport in plantsOct/Nov 2019Paper 1 Q261 Mark

What is a definition of transpiration?

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.

Athe evaporation of water vapour from a leaf due to the diffusion of water from an area of low water potential to high water potential

Bthe loss of water vapour from a plant to its environment by diffusion down a water potential gradient

Cthe movement of water from root to leaf due to the adhesion of water molecules to one another

Dthe uptake of water by plant roots by movement of water down a continuous water potential gradient from air to soil

✓ Correct Answer

The correct answer is B: the loss of water vapour from a plant to its environment by diffusion down a water potential gradient

📋 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 Oct/Nov 2019 examination, Paper 1 Variant 2.

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