Which of the Following Is Not Part of the Transpiration-Cohesion-Tension

question 30

Multiple Choice

Which of the following is not part of the transpiration-cohesion-tension mechanism for the ascent of xylem sap?

• A)loss of water from the mesophyll cells, which initiates a pull of water molecules from neighboring cells
• B)transfer of transpirational pull from one water molecule to the next, owing to cohesion by hydrogen bonds
• C)hydrophilic walls of tracheids and vessels that help maintain the column of water against gravity
• D)active pumping of water into the xylem of roots
• E)lowering of in the surface film of mesophyll cells due to transpiration

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The increase in revenue that results from the sale of one additional unit of a product or service.

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