Root pressure in a plant is measured by

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(B) Root pressure is a positive pressure that develops in the xylem sap of roots of plants. It is measured using a device called a manometer. $A$ mano

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Manometer

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(B) Root pressure is a positive pressure that develops in the xylem sap of roots of plants. It is measured using a device called a manometer. $A$ manometer consists of a $U$-shaped tube containing a liquid (usually mercury or water) that measures the pressure exerted by the root system. Therefore,the correct option is $B$.

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