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Cohesion and adhesion...

Cohesion and adhesion

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  • Which of the following is not part of the transpiration cohesion-adhesion theory of the ascent of xylem sap?

    A
    A) The evaporation of water from the mesophyll cells. which initiates a pull of water molecules from neighbouring cells and eventually from the tracheids.
    B
    B) The transfer of this pull from one water molecule to the next due to the cohesion caused by hydrogen bonds.
    C
    C) The hydrophilic walls of the narrow tracheids and vessels that help to maintain the column of water against the force of gravity
    D
    D) The use of proton pumps to create membrane potentials that facilitate the accumulation of mineral ions.

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