Distinguish between the following with suitable diagram:
Exarch and endarch

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Solution

Exarch is the arrangement in which the protoxylem is directed towards the periphery and metaxylem towards the center. The development of the xylem in this arrangement follows the centripetal pattern. It is the characteristics of roots.
Endarch is the arrangement in which the protoxylem is directed towards the center and metaxylem elements towards the periphery. The development of the xylems in this arrangement follows the centrifugal pattern. It is the characteristics of the stem of flowering plants.

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