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

Question

Quizplus · Accepted Answer

The pressure flow theory, also known as the mass flow hypothesis, is the most widely accepted theory explaining how sugars are transported in the phloem of plants. This theory suggests that sugars are actively transported into sieve tubes, creating a high osmotic pressure that draws water into the tubes, generating a pressure that pushes the sugar solution through the phloem to areas of lower pressure.

The Most Commonly Accepted Theory Used to Explain Movement of Fluid