The tissue of highest respiratory activity is

The $DNA$ content of the quiescent zone is:

Intercalary meristem results in

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 histogens are classified on the basis of:

Histogen theory states that epidermis is derived from the