In the Pressure Flow Model of the movement of sugar through the phloem,what process causes the pressure?

Question

Quizplus · Accepted Answer

The pressure flow model suggests that sugar is loaded into the phloem at the source, creating a higher solute concentration in the phloem than in the surrounding tissues. This causes water to flow into the phloem via osmosis, creating a positive pressure that drives the movement of sugar through the phloem towards the sink, where sugar is unloaded. Therefore, osmosis is the process that causes the pressure in the pressure flow model.

In the Pressure Flow Model of the Movement of Sugar