Q. Two cross-sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by
A) Exarch condition of root and stem
B) Endarch condition of stem and root
C) Endarch condition of root and exarch condition of stem
D) Endarch condition of stem and exarch condition of root
Explanation
Characteristic feature of stem is endarch condition of xylem tissue. In endarch, protoxylem is present towards the centre of stem, while metaxylem towards the pericycle. Characteristic feature of root is exarch condition of xylem tissue. In exarch condition, protoxylem is present towards the pericycle and metaxylem towards the center of the root.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.