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CAIE A-Level Biology 7.2.4 Hydrogen Bonding in Water Transport

Practise distinguishing cohesion from adhesion and linking hydrogen bonds to a continuous xylem water column that transmits transpiration tension through the plant.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • distinguish cohesion between water molecules from adhesion to cellulose walls
  • link hydrogen bonds to a continuous column that transmits transpiration tension
  • interpret xylem or trunk-diameter evidence using water held under tension

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