Vascular cylinder in dicot stems occurs in the form of distinctly separated vascular bundles. Bu...
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Vascular cylinder in dicot stems occurs in the form of distinctly separated vascular bundles. But, in some dicot stems, e.g. Linum, Lonicera, it appears to be a continuous cylinder because
(A) interfascicular region is not developed at all
(B) the interfascicular region is there, but its cells are not differentiable from the cells of vascular bundles
(C) interfascicular region is extremely narrow
(D) continuous vascular cylinder differentiates since the earl stage of development
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