9700/11 Biology May Jun 2023 Online Test | Cambridge AS and A Level MCQ

Which evidence supports the cohesion-tension theory for the movement of water in flowering plants?
1) When the rate of transpiration of a tree is at its maximum, the diameter of the trunk is at its minimum.
2) When a plant shoot is removed close to the base of the stem, sap leaks out from the cut.
3) Evaporation of water from a porous pot can exert a force that draws water up a glass tube attached underneath the pot.
4) Droplets of water…