If you were able to walk into an opening cut into the center of a large redwood tree, when you exit from the middle of the trunk (stem)outward, you would cross, in order,
A) the annual rings, new xylem, vascular cambium, phloem, and bark.
B) the secondary xylem, cork cambium, phloem, and periderm.
C) the vascular cambium, oldest xylem, and newest xylem.
D) the secondary xylem, secondary phloem, and vascular cambium.
E) the summer wood, bark, and phloem.

Question

Quizplus · Accepted Answer

Walking from the center of a large redwood tree outward, you would first cross the annual rings (which are made up of secondary xylem), then the new xylem (which is just the most recent annual ring), followed by the vascular cambium (a layer of cells that produces new xylem and phloem), then the phloem (which transports sugars and other metabolic products downward from the leaves), and finally the bark (which includes all the tissues external to the vascular cambium, including the phloem).

If You Were Able to Walk into an Opening Cut