A-LevelBiologyTransport in plantsOct/Nov 2016Paper 1 Q281 Mark

The diagram shows a model to demonstrate mass flow. In a plant, what are the structures W, X, Y and Z and what is the direction of flow of solution along W? [Figure 28.1]

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.

Aphloem: W, xylem: X, roots: Y, leaves: Z, direction of flow along W: from Z to Y

Bphloem: W, xylem: X, roots: Z, leaves: Y, direction of flow along W: from Y to Z

Cphloem: X, xylem: W, roots: Y, leaves: Z, direction of flow along W: from Y to Z

Dphloem: X, xylem: W, roots: Z, leaves: Y, direction of flow along W: from Z to Y

✓ Correct Answer

The correct answer is B: phloem: W, xylem: X, roots: Z, leaves: Y, direction of flow along W: from Y to Z

📋 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 2016 examination, Paper 1 Variant 2.

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