AP BIOLOGY

Detailed explanation-1: -Upto 99% of water absorbed by the plant is lost via transpiration through plant leaves. Water is necessary for plants but in small amounts. Only 1% of the water taken up by the roots is used for its growth and metabolism. Q.

Detailed explanation-2: -It is estimated that approximately 99% of the water is lost during transpiration by the plants.

Detailed explanation-3: -Final answer: Ninety percent of the water lost by plants during transpiration is through the stomata of the leaf.

Detailed explanation-4: -Ensuring the cooling of plant – the loss of water in the form of water vapour from plants helps the plant to cool down during hot days. Transpirational pull-which is a result of evaporation of water from surfaces of leaves through stomata. This pull helps water to be drawn up in the xylem vessels.

Detailed explanation-5: -It has been estimated, that as much as 98 percent of water absorbed by plant roots is lost via stomatal transpiration.