Question

According to histogen theory, during apical organization three histogens are formed. The part differentiated by plerome is

• A. Cortex
• B. Xylem and phloem
• C. Ground tissue system
• D. Stele

Answer 1

The correct option is D Stele

The histogen theory says that a growing point (as of a stem or root) consists of three histogens, each of which gives rise to a different tissue - dermatogen, periblem, plerome.

The dermatogens makes uniseriate epidermis by anticlinal divisions, periblem forms cortex and plerome serve as progenitor of stele (pericycle, vascular bundles, pith rays or medullary rays and pith).