A potometer is made using a glass U-tube, filled with water and mounted on a stand. In one end of the U-tube, a shoot of a plant is placed and in the other end, a pipette is placed which can be used to measure the decrease in water level. The diagram below shows the potometer being used in an experiment.
- Both the potometers are placed in well-lit rooms.
- All the other conditions except for the conditions mentioned are the same for both potometers. For which of these purposes is a potometer likely to be used?

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