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Question

According to the vital force theory, ascent of sap is due to active pulsation of the innermost layer of cortex. This theory was given by

A
J. C. Bose
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B
Dixon
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C
Strasburger
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D
Sachs
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Solution

The correct option is A J. C. Bose
According to the vital force theory, ascent of sap is due to active pulsation of the innermost layer of cortex. This theory was given by J.C Bose. The pulsation theory states that water is absorbed by the plants due to the metabolic activity of living cells which are in constant state of rythmatic pulsation. But it was not accepted as water can be passively absorbed by the roots even when the cells were dead.
So, the correct answer is option A.

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