A-LevelBiologyTransport in plants9700/12 · Oct/Nov 2017 · Q261 Mark

What contributes to the movement of water through the xylem vessel elements?

Acohesion of water molecules through hydrogen bonding

Bion movement followed by passive osmosis

Cnegative water potential in the xylem

Dsurface tension at the top of the plant

✓ Correct answer

A: cohesion of water molecules through hydrogen bonding

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2017 Paper 1 Variant 2, question 26.

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