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.

Question

Quizplus · Accepted Answer

The observation that air bubbles can interrupt xylem function supports the cohesion-tension theory of water movement. According to this theory, water is pulled up through the xylem due to the cohesive nature of water molecules and the tension created by transpiration at the leaves. Air bubbles in the xylem can break this cohesive chain and interrupt water movement. The other options (A, C, D, and E) are not supported by the observation of air bubbles interrupting xylem function.

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