Which of the Following Does Not Support the Cohesion- Tension

question 14

Multiple Choice

Which of the following does not support the cohesion- tension theory of xylem transport?

• A) Following cutting of a petiole, the xylem sap withdraws from the cut edge toward the blade of the leaf.
• B) Measurements using a root bomb and xylem pressure probe detect negative pressures in xylem tissue.
• C) Following application of a respiration inhibitor to a plant, xylem transport decreases substantially.
• D) Dendrograph measurements detect small daily changes in the diameter of tree trunks.
• E) Pressure bomb measurements detect daily changes in the water potential of leaf tissue.

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