1.

Periderm is made up ofA. PhellemB. PhellogenC. PhellodermD. All the above

Answer» Correct Answer - D
Periderm : During secondary growth in dicot stems towards the outer side cork cambium produces cork outer side and secondary cortex to inner side. The three layers (Phellem, Phellogen and phelloderm) collectively called as periderm.


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