Question

what function cambium Ring do when it becomes active

Answer 1

The intrafascicular and interfascicular cambia thus join up to form a ring (in three dimensions, a tube) which separates the primary xylem and primary phloem, the cambium ring. The vascular cambium  ...

Answer 2

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The vascular cambium generates the xylem and phloem of the vascular system, which are used for transport and support. It is a single layer of meristematic cells that undergoes an expansion during the transition from primary to secondary growth.