Question

Water reaches great heights in the trees because of suction pull caused by ______________.

Answer 1

Hint: It was done by the process where the water is lost from the stomata of the leaf in form of water vapours. The suction pull is the force that supports in the movement of the water in the upward direction that is from root to leaves.

Complete answer:
The plant absorbs nutrients (water and minerals) from the soil. Water is transient in plants. Not all the water is used by the plants. Only one or less than one per cent of water is used in the process of photosynthesis and plant growth. The remaining water loss through the stomata of the leaves. This loss of water from the stomata/aerial part of the plants is known as transpiration. The water which is lost from the stomata is replaced by the xylem vessels in the leaves. The evaporation of water molecules from the cells of the leaves creates a negative pressure in xylem vessels because the water molecules are reduced in the leaves cell as compared to xylem vessels. This generated a suction pull, which can pull the water upward from the xylem cell of the root to the leaves.

Therefore, Water reaches great heights in the trees because of the suction pull caused by transpiration.

Note: Transpiration helps in the absorption and movement of water molecules and minerals from the root to leaves. It also helps in maintaining the temperature regulation. The effect of root pressure in the transportation of water plays an important role during the night because during day time transpiration pull becomes a major driving force in the movement of water in the xylem.