The most commonly accepted theory used to explain movement of fluid in the phloem is
A) cohesion-tension theory.
B) the pressure flow hypothesis.
C) active transport.
D) dialysis.
E) turgor pressure.

Question

Quizplus · Accepted Answer

The most commonly accepted theory to explain the movement of fluid in the phloem is the pressure flow hypothesis, which suggests that sugar is actively transported into the phloem, creating a high concentration of solutes that results in water moving into the phloem from the xylem. This creates a pressure gradient that forces the solution to flow from areas of high pressure to areas of low pressure, allowing the solution to move through the phloem and reach its destination.

The Most Commonly Accepted Theory Used to Explain Movement of Fluid