In a woody dicotyledonous tree,which of the following parts mainly consist of primary tissues?

Initiation of lateral roots and vascular cambium during secondary growth takes place in cells of:

Cork is a derivative of

The wood is,in fact,a

The youngest layer of secondary xylem in the wood of a dicot plant is located:

In old trees,the greater part of secondary xylem is dark brown and resistant to insect attack due to:
$(a)$ secretion of secondary metabolites and their deposition in the lumen of vessels.
$(b)$ deposition of organic compounds like tannins and resins in the central layers of stem.
$(c)$ deposition of suberin and aromatic substances in the outer layer of stem.
$(d)$ deposition of tannins,gum,resin and aromatic substances in the peripheral layers of stem.
$(e)$ presence of parenchyma cells,functionally active xylem elements and essential oils.
Choose the correct answer from the options given below: