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Stem grows in girth due to (a) outer cortical (b) epidermis (c) vascular cambium (d) phellogen

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Stem grows in girth due to

(a) outer cortical

(b) epidermis

(c) vascular cambium

(d) phellogen

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Correct answer: (c) vascular cambium

Explanation:

Stem increase in girth due to the activity of vascular cambium. In this process, the outer cortical and epidermis layers gets broken.

This layer is replaced with new protective cell layer.

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