A) medullary rays
B) xylem parenchyma
C) endodermis
D) pericycle
Correct Answer: A
Solution :
In dicot stems, the cells of cambiu present between primary xylem and prima phloem is the intrafasicular cambium. The cells of medullary rays, adjoining these intrafascicular cambium become meristematic and form the interfascicular cambium. Xylem parenchyma are living and thin-walled and their cell walls are made up of cellulose. In dicot roots the innermost layer of the cortex is called endodermis. Next to endodermis lies a few layers of thick-walled parenchymatous cells called as pericycle.
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