Why transpiration is called a necessary evil ? Explain properly
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Transpiration is the process in which there is a loss of water in the form of water vapour from the stomatal openings. ... Due to the process of transpiration, there is pressure on the plant for the absorption of water. Therefore, the process of transpiration is called a necessary evi
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(1)The loss of water in the iorm ol water vapour is called transpiration.
(2) about 90- 93% of transpiration occurs through stomata, small apertures located in the epidermis of leaves.
(3) For this process stomata must remain open and then only gaseous exchange by diffiusion takes places.
(4) gaseous exchange is Lecessary for respiration and photosynthesis. If stomata remain closed then it will affect productivily of plant.
(5) The process is necessary evil because water which is important for plant is lost in the process.
(6) At the same time it helps in absorpion of water and its translocation. Hence it cannot be avoided.
(7) So Curtis has rightly called it as necessary evil.
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