Transport in plants

i Understand the structure of xylem and phloem tissues in relation to their role in transport.

ii Understand how water can be moved through plant cells by the apoplastic and symplastic pathways.

iii Understand how the cohesion-tension model explains the transport of water from plant roots to shoots.

iv Understand how temperature, light, humidity and movement of air affect the rate of transpiration.

v Understand the strengths and weaknesses of the mass-flow hypothesis in explaining the movement of sugars through phloem tissue.

CORE PRACTIAL 8: Investigate factors affecting water uptake by plant shoots using a potometer.