A-LevelBiologyTransport in plants9700/12 · Oct/Nov 2013 · Q241 Mark

Which feature of xylem vessel elements helps the cohesion of water?

Alignin forms an incomplete secondary wall

Bnew vessels carry extra water as a plant grows

Cthere are no cross walls between the vessel elements

Dthe vessel elements form narrow tubes

✓ Correct answer

D: the vessel elements form narrow tubes

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2013 Paper 1 Variant 2, question 24.

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