ConceptConceptDocsDocuments

CAIE A-Level Biology 7.2.8 Mass Flow in Phloem

Practise linking source loading and sink unloading to water-potential changes, osmosis and the hydrostatic-pressure gradient that drives mass flow through sieve tubes.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • connect source loading with lower water potential, osmotic water entry and raised pressure
  • explain bulk flow through sieve tubes down a hydrostatic-pressure gradient
  • connect sink unloading with increased water potential, water exit and lower pressure

No Question Bank Yet

Questions will appear here when available.