Tunica corpus theory was proposed by

The quiescent centre in root meristem serves as a

The shoot apex is protected by which of the following?

Identify the tissues $P$ and $Q$ based on their functions:
Tissue $P$: Responsible for the increase in length of roots and stems.
Tissue $Q$: Responsible for the increase in girth (thickness) of roots and stems.
Choose the correct option for $P$ and $Q$.

The root apical meristem is present in ............ .

Where would you look for active cell division in plants?