A) cortex
B) stele
C) apical meristem
D) vascular bundle
Correct Answer: C
Solution :
According to Histogen theory of Henstein (1868) shoot apex is divided into three zones, each zone consists of a group of initial cells and is called a histogen or a tissue builder. These three histogens of the stem apex and root apex arc the dermatogen, a meristematic external layer the plerome, a central core and the periblem the region between these two.
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