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(A) The Vital Force Theory suggests that the ascent of sap is due to the activity of living cells. Among the various theories proposed,the Relay Pump

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Godlewsky

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(A) The Vital Force Theory suggests that the ascent of sap is due to the activity of living cells. Among the various theories proposed,the Relay Pump Theory,which is a type of vital force theory,was proposed by Godlewsky in $1884$. This theory suggests that the living cells of the xylem parenchyma and medullary rays act as pumps to push water upwards. Therefore,the correct option is $A$.

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