NEET Biology question

The cells of the phellogen divide periclinally to produce phellem (cork) on the outer side and secondary cortex (phelloderm) on the inner side. This is necessary to

(A)Replace the vascular cambium
(B)Provide for increase in girth while preventing rupturing of outer ground tissues due to secondary vascular tissue formationCorrect
(C)Stop the process of secondary growth
(D)Produce new leaves

Answer: (B)

Solution

As secondary vascular tissue (secondary xylem/phloem) accumulates and the stem's girth increases, the outer primary tissues would otherwise rupture; the phellogen's

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Question ID VK-105772