Phloem transport of sucrose is often described as going from source to sink. Which of the following would not normally function as a sink?

Question

Quizplus · Accepted Answer

A mature leaf would not normally function as a sink because it is not actively growing or metabolically active, and therefore does not require a large amount of sucrose for energy. The other options, such as a growing leaf, growing root, storage organ, and shoot tip, are all actively growing and metabolically active, and thus require a steady supply of sucrose for energy and growth.

Phloem Transport of Sucrose Is Often Described as Going from Source