What is the role of air bubble and reservoir in the potometer?
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1
Answer:
As water is transpired from the leaves, the shoot absorbs water from the potometer. The distance the air bubble moves in a certain period of time can be used to calculate the rate of water uptake. The apparatus is set up under water to prevent the entry of any unwanted air bubbles
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18
Answer:
The air bubble in Ganong's potometer is to mark the progress of transpiration and absorption of water by the freshly cut leafy twig which must be devoid of any roots.
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