A) atmospheric theory
B) cohesion and transpiration pull theory
C) root pressure theory
D) pulsation theory
Correct Answer: B
Solution :
Cohesion and transpiration pull theory was proposed by Dixon and Jolly in 1894. This theory is based on two parts (i) transpiration pull exerted on the water column (ii) cohesion property of water molecules so as to form an unbroken column of water in the xylem.
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