According to the cohesion-tension mechanism of water transport, which of the following DOES NOT

contribute to the flow of the xylem sap?



a. hydrogen bonds between water molecules
b. adhesion of water molecules to the xylem vessel walls
c. evaporation of water from the leaves
d. water potential in leaf cells below that of the leaf xylem
e. root pressure


E

Biology & Microbiology

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