First slide

Anatomy of Dicotyledonous and Monocotyledonous Plants

Question

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

Easy

A

absence of secondary phloem.
B

presence of cortex.
C

position of protoxylem.
D

absence of secondary xylem.

Solution

Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by position of protoxylem. In dicot root the protoxylem is located near the periphery of the vascular cylinder while in dicot stem the protoxylem is located near the centre of vascular bundle i.e. the xylem is endarch.

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