LABORATORY REVIEW
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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This is not a precaution in the use of the potometer
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The twig may not remain alive for long
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The potometer should be water tight
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The twig should be cut under water
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The twig should be cut obliquely
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Explanation:
Detailed explanation-1: -The shoot must be held in contact with the water; additionally, the surface of the water should not be exposed to the air. Otherwise, evaporation will interfere with measurements. A rubber bung greased with petroleum jelly suffices.
Detailed explanation-2: -So the correct answer is ‘Water retained by plants is neglected’.
Detailed explanation-3: -Leave undisturbed for 5 minutes or until the shoot equilibrates to the conditions.
Detailed explanation-4: -Complete answer: The rate of transpiration cannot be measured accurately by the potometer because in the [process of transpiration all the water is not taken by the plant.
There is 1 question to complete.