Distinguish between the following: Exarch and endarch condition of protoxylem.

Lateral roots arise from primordia developed by the division of:

$A$: In monocot roots,the pericycle gives rise to lateral roots and cork cambium.
$R$: It usually has tetrach vascular bundles.

Well-developed pith and exarch vascular bundles are characteristics of which of the following?

Vascular bundles of roots are:

You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?