Multiple choice

Exarch xylem is found in

  1. root only

  2. dicot stem & dicot root

  3. monocot stem & monocot root

  4. stem only
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A Correct answer
Explanation

 The roots of vascular plants are normally considered to have exarch development .Exarch is used when there is more than one strand of primary xylem in a root, and the xylem develops from the outside inwards towards the center, i.e. centripetally.

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