Q. Identify from the following, a plant tissue in which lignin does not occur in the cell walls?
A) Collenchyma
B) Sclerenchyma fibres
C) Sclereids
D) Xylem tracheae
Explanation
Collenchyma cells are elongated and polygonal with tapering ends, found in outer region of cortex, e.g., angles of stems, midrib of leaves, etc. The cell wall of collenchyma consists of cellulose, pectins and hemicellulose.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.