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You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?
A
Secondary xylem
B
Secondary phloem
C
Protoxylem
D
Cortical cells
Detailed Solution
After secondary growth both organs have similar secondary xylem and phloem.
The primary xylem still differs: protoxylem is exarch (towards the periphery) in the root and endarch (towards the centre) in the stem.
The primary xylem still differs: protoxylem is exarch (towards the periphery) in the root and endarch (towards the centre) in the stem.