A) modified pericycle
B) elongated endodermis
C) elongated cortical cell
D) modified xylem vessel
Correct Answer: B
Solution :
In Selaginella, the endodermal cells elongate to form trabeculae connecting the two tissues. As each trabecular cell develops, cuticularization occurs on the external surface at a point midway along the cell and forms the trabecular ring. The plasmalemma of the trabecular cell becomes attached to the wall beneath the main concentration of the ring, resembling the connection between the plasmalemma and the casparian strip of a primary endodermis. The trabeculae retain a functional cytoplasm throughout growth.
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