Question

(vi) Secondary wall is made up of
(a) Pectin and cellulose
(c) Cellulose and lignin
(b) Cellulose and protein
(d) Lignin and pectin
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Answer 1

Answer:

cellulose and lignin

hope it helps you

Answer 2

Answer:

Secondary walls are mainly composed of cellulose, hemicelluloses (xylan and glucomannan) and lignin, and are deposited in some specialized cells, such as tracheary elements, fibers and other sclerenchymatous cells.