Which events and features are correctly associated with the roots during the pressure-flow model of phloem transport?
A) Sugar is stored in the sink. Cells use the sugar for cellular respiration. Water exits by osmosis and returns to the xylem.
B) Sugars are stored in the source. Cells use the sugar for cellular respiration. Water exits by osmosis and returns to the xylem.
C) Sugar is stored in the sink. Cells use the sugar for photosynthesis. Water exits by osmosis and returns to the xylem.
D) Sugar is stored in the sink. Cells use the sugar for cellular respiration. Water exits by diffusion and returns to the phloem.
E) Sugar is stored in the source. Cells use the sugar for photosynthesis. Water exits by osmosis and returns to the xylem.

Question

Quizplus · Accepted Answer

In the pressure-flow model of phloem transport, the sink refers to the location where sugars are unloaded and used or stored, such as roots. Here, sugar is used for cellular respiration, and the resulting osmotic changes cause water to exit the phloem and return to the xylem, maintaining fluid movement.

Which Events and Features Are Correctly Associated with the Roots