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Anatomy of root
Concepts tested here
- Polyarch condition
All Questions
2012 AIPMT-MAINS 1 question
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As compared to a dicot root, a monocot root hasA dicot root usually has two to four xylem and phloem patches (diarch to tetrarch).
A monocot root has many xylem bundles, usually more than six (the polyarch condition), together with a large, well-developed pith.
Monocot roots do not undergo secondary growth.
Therefore a monocot root has no periderm, no secondary xylem and no annual rings, so the other three comparisons cannot hold.
Hence, compared to a dicot root, a monocot root has many xylem bundles.