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Which feature is present in a monocot root but absent in a typical dicot root?
ACasparian strip thickenings
BA ring of vascular cambium
CActive secondary growth
DA well-developed central pith
Answer & Solution
Correct answer: D. A well-developed central pith
1. In the dicot root the pith is absent or very small.
2. In the monocot root a well-developed pith is present at the centre.
3. So pith presence distinguishes the monocot root.
4. Cambium and secondary growth are features of the dicot root, not the monocot, so they are ruled out.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 12 Plant Anatomy and Plant Physiology "Differences between Dicot and Monocot root", p.184_
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