Starting from the outside and moving in toward the center, which list gives the correct order of tissues in the stem of a
young tree?
a. secondary phloem, primary phloem, primary xylem, secondary xylem
b. primary xylem, secondary xylem, secondary phloem, primary phloem
c. primary phloem, secondary xylem, secondary phloem, primary xylem
d. secondary phloem, primary xylem, secondary xylem, primary phloem
e. primary phloem, secondary phloem, secondary xylem, primary xylem
ANSWER: e
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