LABORATORY REVIEW
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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99% of water taken by the plant evaporates through transpiration
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9% of water taken by the plant evaporates through transpiration
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Evaporation through transpiration accounts only for 1% of all the water the plant takes in
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Evaporation through transpiration is minuscule
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Detailed explanation-1: -A plant does not use most of the water that it absorbs. About 97-99% of the water is lost through transpiration. Transpiration is defined as the physiological loss of water in the form of water vapor, mainly from the stomata in leaves, but also through evaporation from the surfaces of leaves, flowers, and stems.
Detailed explanation-2: -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.
Detailed explanation-3: -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-4: -Transpiration is the process by which plants lose water through small pores called stomata present on the underside of the leaves. The main functions of transpiration in plants are cooling and the absorption and conduction of water from roots to other parts of the plant.
Detailed explanation-5: -It is estimated that approximately 99% of the water is lost during transpiration by the plants.