Question

The organization of the shoot apex into tunica and corpus is determined largely on the basis of _______________.

• A. Rate of shoot tip growth
• B. Rate of cell division
• C. Planes of cell division
• D. Regions of meristematic activity

Answer 1

The correct option is B Rate of cell division

Schmidt has postulated tunica- corpus theory on the basis of studies of shoot apices of angiosperm. This theory is concerned with planes of cell division in the apex. In contrast to apical cell theory, the tunica-corpus theory is applicable only to shoot apex and not to root. There are three types of meristematic tissues like apical (at the tips), intercalary (in the middle) and third as lateral (at the sides).

Schmidt distinguished two tissue zones in the shoot apex and termed as tunica and corpus.

The correct answer is B.