In 2005, a spot 1 centimeter from the center of a woody stem is in the bark. In what tissue will the same spot 1 cm from the center) be in 2050?
A) bark
B) vascular cambium
C) secondary phloem
D) secondary xylem
E) impossible to tell

Question

Quizplus · Accepted Answer

In woody stems, the bark is the outermost layer and is continuously sloughed off as the stem grows. The vascular cambium is the layer of actively dividing cells responsible for producing secondary xylem (wood) and secondary phloem (inner bark). Therefore, by 2050, the spot 1 cm from the center of the woody stem will be in the secondary xylem, which is produced by the vascular cambium.

In 2005, a Spot 1 Centimeter from the Center of a Woody