Which of the following describes how phloem sap moves within a plant?

Question

Quizplus · Accepted Answer

Phloem sap moves within a plant through the pressure-flow mechanism, where sugars are actively transported into the sieve tubes and create a high concentration gradient that drives water to follow via osmosis, resulting in a pressure gradient that pushes the sap from source (leaves/photosynthetic tissues) to sink (growing or storing tissues). The bulk-flow mechanism refers to the movement of water and minerals in xylem tissues, while the sugar-flow and sink-to-source mechanisms are not commonly used terms in the description of phloem sap transport.

Which of the Following Describes How Phloem Sap Moves Within