How many xylem bundles are found in the internal structure of a sunflower root?

Which of the following is a stelar tissue in the primary internal structure of dicotyledonous root but not a stelar tissue in the primary internal structure of dicotyledonous stem?

How many histogens are present in the root apex of dicots?

If four radial vascular bundles are present,then the structure will be

When the protoxylem is located towards the periphery,the arrangement is called:

Lateral roots arise from primordia developed by the division of: