DP Biology (first assessment 2025)

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Question SPM.1A.HL.TZ0.1

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Date May Specimen-2023 Marks available [Maximum mark: 1] Reference code SPM.1A.HL.TZ0.1
Level HL Paper 1A Time zone TZ0
Command term Question number 1 Adapted from N/A
1.
[Maximum mark: 1]
SPM.1A.HL.TZ0.1

What allows the movement of water under tension in the xylem?


A.  Adhesion of water molecules to dissolved mineral salts

B.  Cohesion of water molecules due to hydrogen bonding

C.  Adhesion between water molecules due to uneven sharing of charges

D.  Cohesion between water molecules and other polar substances

[1]

Markscheme

B

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