The primary meristem of the root is:

Periblem gives rise to

The meristematic tissue responsible for the increase in the girth of a tree trunk is:

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 $Q$.

Root apical meristem is derived from the

"Cytochimeras" means