1.

The thickening of the walls of the sclerenchyma tissues is due to (a) suberin (b) magnesium (c) lignin (d) calcium

Answer»

(c) Sclerenchyma is a supporting tissue. Two groups of sclerenchyma cells exist: fibres and sclereids. Their walls consist of cellulose and/or lignin. Sclerenchyma fibres are of great economical importance, since they constitute the source material for many fabrics flax, hemp, jute, ramie.



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