If you were able to walk into an opening cut into the center of a large redwood tree, when you exited 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 inside of a tree trunk outward, you would first cross the annual rings (which are made up of secondary xylem), then the new xylem (also part of the secondary xylem), followed by the vascular cambium (a layer of cells that produces the xylem and phloem), then the phloem (the tissue that transports sugars and other metabolic products downward from the leaves), and finally the bark (which includes the outer protective layers of the tree).

If You Were Able to Walk into an Opening Cut