Histogens are components of,or the histogens are differentiated in:

Which of the following are characteristics of cells in the meristematic region?
$I-$ Cells divide continuously.
$II-$ Cells are rich in protoplasm.
$III-$ Cells possess a large,conspicuous nucleus.
$IV-$ All cells of meristematic tissue are differentiated.
$V-$ Cell walls are primary,thin,and cellulosic with abundant plasmodesmata.

The $Tunica-Corpus$ theory was proposed by:

The histogens are classified on the basis of:

In which of the following situations can an intercalary meristem be present?

Injured parts of a plant are repaired by