Q. 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
Explanation
[Solution] Protoxylem is endarch in stem and exarch in root, and it persists even after secondary growth. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.