AP BIOLOGY

Detailed explanation-1: -This is called the cohesive force the water molecules are also attracted to the wall of a glass capillary tube which is similar to the inside of the xylem vessel . Because of this, water rises up in the xylem vessel to some distance up dragging other water molecules present below them.

Detailed explanation-2: -As transpiration occurs, it deepens the meniscus of water in the leaf, creating negative pressure (also called tension or suction). The tension created by transpiration “pulls” water in the plant xylem, drawing the water upward in much the same way that you draw water upward when you suck on a straw.

Detailed explanation-3: -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.

Detailed explanation-4: -A transpiration pull could be simply defined as a biological process in which the force of pulling is produced inside the xylem tissue. This force helps in the upward movement of water into the xylem vessels. In this process, loss of water in the form of vapours through leaves are observed.

Detailed explanation-5: -Cohesion and adhesion work together in the xylem to pull water molecules from the roots, up the stem, and out of the plant through the stomata. The flow of water transport is impacted by the plant rate of transpiration.