The undifferentiated cells are present in

$A$ : According to Clowes, there are three histogens in monocot root.

$R$ : In dicot roots, innermost groups of initials form root cap.

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

In plants like Nymphaea which is attached emerged hydrophyte, the stomata are present on

In dicot stem, secondary xylem lie towards the ...$A$... and secondary phloem lie towards the ...$B$...

Choose the correct combination of options for $A$ and $B$

Tyloses an outgrowth from ray or axial parenchyma cell into the lumen of a vessel, which partially or completely blocks the cavity are present in