Cortex and pith are not distinguished in

Monocot stem

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Monocot root

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Dicot stem

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Dicot root

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Solution

The correct option is A Monocot stem
The ground tissues in dicot stem are well differentiated into cortex, endodermis, pericycle and pith but are undifferentiated in monocot stem. Dicot stem has pith with thin walled parenchymatous cells but monocot stem lacks it. Primary dicot root has no or reduced pith, whereas a large pith, sometimes sclerenchymatous, is present in the monocot root.
Therefore, the correct answer is option A.

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Similar questions

	Characters	Monocot root	Dicot root
(i)	Vascular bundle	Polyarch i.e., more than $6$ vascular bundles	Diarch to hexarch i.e., $2 - 6$ vascular bundles
(ii)	Cambium	Absent	Present, so secondary growth occurs
(iii)	Pith	Poorly developed	Well developed large pith
(iv)	Activity of pericycle	Gives rise to secondary roots and cork cambium	Gives rise to lateral roots only

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