If Water Were Being Pushed from Below,air Bubbles in the Xylem

question 50

Multiple Choice

If water were being pushed from below,air bubbles in the xylem stream would not pose a problem.However,the observation that air bubbles can interrupt xylem function provides important evidence supporting the ________ theory of water movement.

• A) gravity-suction
• B) active transport
• C) pressure-flow
• D) osmotic
• E) cohesion-tension

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Definitions:

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