In dicot roots,after two or three years of secondary growth,the cortex is:

The process by which plants become woody is:

The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood.
$(a)$ It is also called as the earlywood
$(b)$ In spring season cambium produces xylem elements with narrow vessels
$(c)$ It is lighter in colour
$(d)$ The springwood along with autumnwood shows alternate concentric rings forming annual rings
$(e)$ It has lower density
Choose the correct answer from the options given below:

Cork is the best material for making bottle stoppers because .....................

Grafting is attempted in those plants which show:

Diffused porous woods are characteristic of plants growing in