A) cohesion and transpirational pull
B) turgor pressure
C) osmotic pressure
D) root absorption
Correct Answer: A
Solution :
Cohesion of water and transpiration pull theory for ascent of sap is most widely accepted theory. It was proposed by Dixon and Jolley (1894). Later in 1914 and 1924 Dixon put forward several experimental evidences in support of this theory and concluded that water rises in the stem through cohesion and transpiration pull.
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