Secondary plant cell walls are strengthened by
A) the polyphenolic compound lignin.
B) the arrangement of cellulose microfibrils.
C) cement-like polysaccharides called pectins.
D) the arrangement of groups of rigid plasmodesmata.
E) the acetylglucosamine polymer chitin.

Question

Quizplus · Accepted Answer

The polyphenolic compound lignin is a major component of secondary plant cell walls and provides strength and rigidity.

Secondary Plant Cell Walls Are Strengthened by