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Question
Suppose you have a small rose plant growing in a pot. How would you demonstrate transpiration in it?
Solution
Take the small potted rose plant and cover it with a transparent polythene bag. Tie its mouth around the base of the stem. Leave the plant in sunlight for an hour or two.
Drops of water will soon appear on the inner side of the bag due to the saturation of water vapour given out by the leaves. A similar empty polythene bag with its mouth tied and kept in sunlight will show no drops of water. This is the control to show that plants transpire water in the form of water. If tested with dry cobalt chloride paper, the drops will be confirmed as water only.
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RELATED QUESTIONS
State whether the following statement is true or false. Rewrite the false statement correctly.
During transpiration, the leaves lose more water from their upper surface.
Name the factors which affect the rate of transpiration? State their role in each case.
(a) State whether the following statement are True or False.
(b) Rewrite the false statement in (a) above in the correct form by changing either the first or the last word only.
Transpiration creates a pull for the upward movement of the sap.
Given below is an apparatus which has setup to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow:
Name the process being studies. Define the process.
Briefly explain how the rate of transpiration is affected by:
Humidity of the atmosphere
Explain the Term
Transpiration
Name the following:
Holes present on the surface of the stems and twigs for transpiration.
Name the following:
Plants in which lenticular transpiration.
Complete the following sentence with appropriate word:
Plants become cool as a result of __________.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
More transpiration occurs from the upper surface of a leaf.
