Once water is absorbed by plant roots, it has to travel against gravity through xylem. How do the 'dead' cells of the xylem work together with the living cells of leaves at the top to keep the water moving? [Pg. No. 34]

The dead xylem cells form continuous hollow tubes that provide a pathway for water movement from roots to leaves. In the leaves, living cells lose water through transpiration. This process creates transpiration pull, which draws water upward through the xylem against gravity. Thus, the dead xylem cells and the living leaf cells work together to maintain the upward movement of water.