Some vascular bundles are described as open because these

Options

A. Possess conjunctive tissue between xylem and phloem
B. Are not surrounded by pericycle
C. Are surrounded by pericycle but no endodermis
D. Are capable of producing secondary xylem and phloem

Answer

D

Explanation

In open vascular bundle, cambium is present between xylem and phloem of the same vascular bundle e.g. divot stem. Due to the presence of cambium secondary growth in stem occurs and secondary permanent tissues are formed.