The first vital theory to explain ascent of sap was proposed by

J. C. Bose

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Godlewski

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Blackmann

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Dixon and Jolly

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Solution

The correct option is B Godlewski
The first vital theory to explain ascent of sap was proposed by Godlewski who gave relay pump theory. According to him, there was a rhythmic change in the osmotic pressure of the living cells of xylem such as parenchyma and medullary rays which brought about a pumping action of water in an upward direction. Hence option B is correct.

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