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Radical vascular bundles are those in which

  • A.Xylem is surrounded by phloem
  • B.Phloem is surrounded by xylem
  • C.Xylem and phloem occur on the same radius
  • D.Xylem and phloem occur on the different radii

Answer: D

In a radial vascular bundle the xylem and phloem lie on different radii, alternating around the axis.

This is the arrangement in roots. In stems the two lie on the same radius, phloem outside xylem, forming collateral bundles.

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