The pressure flow model of translocation depends entirely on the existence of mechanisms for loading sugars into phloem at the _______ regions and for unloading them at the _______ regions.

Question

Quizplus · Accepted Answer

The pressure flow model of translocation depends on the sugar transport from source regions where sugars are synthesized or stored to sink regions where they are utilized. Therefore, the model requires mechanisms for loading sugars into phloem at the source regions and for unloading them at the sink regions. Choice D correctly identifies that the model depends entirely on the existence of loading mechanisms at source regions and unloading mechanisms at sink regions.

The Pressure Flow Model of Translocation Depends Entirely on the Existence