AP BIOLOGY

Detailed explanation-1: -Capillary action is the phenomenon that causes water to rise from plant roots to leaves. Moisture is transported through plants via transpiration, from roots to tiny pores on the underside of leaves, where it transforms into vapour and is discharged into the atmosphere.

Detailed explanation-2: -Plant stems have some very special cells called xylem. These cells form long thin tubes that run from the roots up the stems to the leaves. Their job is to carry water upward from the roots to every part of a plant.

Detailed explanation-3: -Solution: Transpiration process in plants creates a suction pressure which pulls up water from the xylem of the roots to the stem and then to the leaves.

Detailed explanation-4: -Xylem is one of the two types of transport tissue in vascular plants, phloem being the other. The main function of xylem is conduction of water from roots to the leaves via the stem.

Detailed explanation-5: -Capillary action helps bring water up into the roots. But capillary action can only “pull” water up a small distance, after which it cannot overcome gravity. To get water up to all the branches and leaves, the forces of adhesion and cohesion go to work in the plant’s xylem to move water to the furthest leaf.