7. Describe the process of transpiration in plants with the help of an activity.
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Take a potted plant and cover it with a polythene bag. Observe it after a few hours. You will notice a few droplets of water in the polythene bag. This shows that the leaves of the plant are showing transpiration.
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Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. The remaining 97–99.5% is lost by transpiration and guttation.
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