The figure below illustrates how food is transported in phloem tissue.

At what step(s)during the movement of sugar does the plant provide metabolic energy?

Question

The figure below illustrates how food is transported in phloem tissue.

At what step(s)during the movement of sugar does the plant provide metabolic energy?

Quizplus · Accepted Answer

The plant provides metabolic energy at step 1 when sugars are loaded into the phloem. This process requires the active transport of sugars against their concentration gradient, which requires the expenditure of energy. The other steps do not directly involve the use of metabolic energy by the plant.

The Figure Below Illustrates How Food Is Transported in Phloem