For ascent of sap, capillary force theory was first proposed by

Sachs

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Christian Wolf

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Strasburger

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Dixon and Joly

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Solution

The correct option is A Christian Wolf
Scientist Christian Wolf proposed the theory of capillary force for the ascent of sap. He proposed that when water is present in fine tubes then a force develops which causes ascent of sap which is known as capillary force.
So, the correct answer is 'Christian wolf'.

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