Q. Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by

A) Absence of secondary xylem
B) Absence of secondary phloem
C) Presence of cortex
D) Position of protoxylem
Explanation

In dicotyledonous root, the condition of xylem is exarch as the protoxylem away from the centre and metaxylem towards the centre. In dicotyledonous stem (e.g., Cucurbita), the condition of xylem is endarch as the metaxylem away from the centre and protoxylem towards the centre.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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