Which of the following prevents water moving through the xylem from falling back towards the roots?

Question

Quizplus · Accepted Answer

Cohesion and adhesion are the forces that hold water molecules together and to the xylem vessel walls, respectively. These forces prevent water from falling back towards the roots and instead allow it to be pulled up the plant through transpiration. Osmosis, simple diffusion, gravity, and ionic bonds do not play a significant role in preventing water from moving in this direction.

Which of the Following Prevents Water Moving Through the Xylem