The inference of Darwin's potometer is

Rise in mercury in the tube indicates the pressure averted by transpiration.

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Rise in mercury in the tube indicates the suction exerted by transpiration.

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Both A and B

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None of these

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Solution

The correct option is B Rise in mercury in the tube indicates the suction exerted by transpiration.
Transpiration is loss of water in the vapour from the aerial parts of a plant. The inference of Darwin's potometer is option (B).

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One end of a U-tube containing mercury is connected to a suction pump and the other end to atmosphere. A small pressure difference is maintained between the two columns. Show that, when the suction pump is removed, the column of mercury in the U-tube executes simple harmonic motion.

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The inference of Darwin's potometer is

The correct option is B Rise in mercury in the tube indicates the suction exerted by transpiration.Transpiration is loss of water in the vapour from the aerial parts of a plant. The inference of Darwin's potometer is option (B).

The correct option is B Rise in mercury in the tube indicates the suction exerted by transpiration.
Transpiration is loss of water in the vapour from the aerial parts of a plant. The inference of Darwin's potometer is option (B).