When cut stump of a plant is fitted with a manometer, the level of mercury rises due to the accumulation of

Water

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Oxygen

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Mercury

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Gas

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Solution

The correct option is A Water
Roots have absorbed water and this has given rise to root pressure, which is pushing mercury in the manometer from behind. Root pressure develops because root cells accumulate mineral salts, which pulls water inside the roots, as water follows natural route of higher to lower water potential. This develops a pressure called as root pressure.

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