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Q.
Exarch and polyarch condition found in
NTA AbhyasNTA Abhyas 2020Anatomy of Flowering Plants
Solution:
When the development of xylem takes place towards the centre of the axis or in other words the protoxylem develops towards the periphery, it is called centripetal xylem and the xylem strand as exarch. The vascular bundles are scattered in monocots and hence it is polyarch condition. Exarch and polyarch condition of vascular bundle is found in monocot roots.