The following factors may sometimes play a role in the movement of sap through xylem. Which one depends on the direct expenditure of ATP by the plant?

Question

Quizplus · Accepted Answer

The movement of ions in the symplast (the continuum of cytoplasm connected by plasmodesmata between cells) often requires active transport, which directly uses ATP. This can create a concentration gradient that drives the osmotic movement of water into the xylem, facilitating sap movement. The other options (A, B, C, E) involve physical processes that do not directly require the expenditure of ATP by the plant.

The Following Factors May Sometimes Play a Role in the Movement