Activity on transpiration
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Answer:
Aim: To show that plants lose water through their leaves during transpiration.
Procedure:
Take a medium-sized well-watered plant.
Cover the plant with a transparent polythene bag completely and tie its mouth around the base of the stem.
Take a similar empty polythene bag and tie its mouth. This polythene bag will act as the control for the experiment.
Keep the plant as well as the empty polythene bag in the sunlight for 1–2 hours.
Observation:
Drops of water appear on the inner side of the polythene bag.
No such drops appear in the empty polythene bag.
Inference:
The plant gives off water vapour through its leaves which saturates and condenses on the inner surface of the polythene bag.
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