Question

14. Give reasons:- a) Xylem tracheids transports water upwards but the epidermal cells and parenchyma cells around vascular tissue get water?

Answer 1

Answer:

night, when stomata close and transpiration stops, the water is held in the stem and leaf by the cohesion of water molecules to each other as well as the adhesion of water to the cell walls of the xylem vessels and tracheids. ... The cohesion-tension theory explains how water moves up through the xylem.

Xylem carries water and minerals up from the roots, where these valuable substances are absorbed, to stems and leaves which may be hundreds of meters above the ground. Phloem carries food from the leaves which produce it to storage areas (often down to the roots) or growth areas in other parts of the plant.

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