Injured parts of a plant are repaired by

Primary vascular tissues are derived from

On the basis of origin,meristematic tissues can be classified into how many groups?

Tunica corpus theory is related to:

There is no distinction between tunica and corpus layers in the stem apices of

According to the $Apical$ $Cell$ $Theory$, the shoot apex contains a single apical cell with three cutting faces. This theory applies to some higher algae, bryophytes, and pteridophytes, but not to gymnosperms and angiosperms. Who proposed this theory?