Secondary growth is absent in

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(C) Secondary growth is the increase in girth or diameter of the plant body due to the activity of lateral meristems (vascular cambium and cork cambiu

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Monocot stem

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(C) Secondary growth is the increase in girth or diameter of the plant body due to the activity of lateral meristems (vascular cambium and cork cambium).In $Dicot$ stems,$Dicot$ roots,and $Gymnosperms$,secondary growth occurs due to the presence of vascular cambium.In $Monocot$ stems,the vascular bundles are scattered and closed (i.e.,they lack cambium),which prevents the formation of secondary tissues. Therefore,secondary growth is absent in $Monocot$ stems.

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