Question

Why sclerenchyma is called dead permanent tissue?

Answer 1

Sclerenchyma doesn’t have a nucleus and they are a permanent tissue in plants hence, dead permanent tissue.

Answer 2

Answer:

Mature sclerenchyma cells are usually dead cells that have heavily thickened secondary walls containing lignin. ... They characteristically contain very thick, hard secondary walls lined with lignin; consequently, sclerenchyma provides additional support and strength to the plant body.