First slide

The Tissues

Question

In endarch condition of xylem, metaxylem lies _____ of protoxylem

Easy

A

on outer side
B

on inner side
C

both on inner and outer side
D

in centre

Solution

Primary xylem is of two types – protoxylem and metaxylem. The first formed primary xylem elements are called protoxylem and the later formed primary xylem is called metaxylem. In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. This type of primary xylem is called endarch. In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of primary xylem is called exarch.

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