Question
Biology Question on Anatomy of Flowering Plants
In a mature dicot stem which has undergone secondary growth, youngest layer of secondary xylem is situated
A
in between pith and primary xylem
B
just outside the vascular cambium
C
just inner to the vascular cambium
D
just inner to the phellogen
Answer
just inner to the vascular cambium
Explanation
Solution
The cambial ring present between primary xylem and primary phloem becomes active and begins to cut off new cells, both towards the inner and the outer sides. The cells cut off towards pith mature into secondary xylem and the cells cut off towards periphery mature into secondary phloem.