Question

What is the role of air bubbles in the experiment

Answer 1

Explanation:

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. A photometer is a device which is used to measure the rate of water uptake by the plant.

Answer 2

Answer:

The air bubble introduced into the horizontal graduated capillary tube moves along as transpiration proceeds. As the water is lost from the twig, a suction force is set up which pulls the water from the beaker and the bubble in the capillary tube moves along.

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