Vascular cambium in dicot root develops from
Endodermis
Pericycle
Conjunctive parenchyma
$(b)$ and $(c)$ both
In a transverse section of a dicot root
In monocot roots which types of vascular bundles are found
The layer of cells outside the phloem meant for giving rise to the root branches is called
Velamen tissue in orchids is found in