Secondary growth in dicot roots is not characterised by (A) wavy ring of vascular cambium (B) de...

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Secondary growth in dicot roots is not characterised by
(A) wavy ring of vascular cambium
(B) dedifferentiation of cells just below the phloem bundles
(C) vascular cambium is half in primary and half in secondary origin
(D) purely secondary origin of cork cambium
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