Question

Mechanical tissues and their distribution

Answer 1

Answer:

The most important mechanical tissues are sclerenchyma fibres with highly lignified walls and peculiarly interlocked ends, sclereids, with massive lignified walls, and collen­chyma with unevenly thickened cellulose walls. The sclerenchyma fibres, as already stated, may be present in cortex, in pericycle, with vascular elements and even in pith. They are undoubtedly the most effective mechanical tissues. Sclereids may occur in different parts of the plants for the same purpose.

Collenchyma forms either continuous strands or iso­lated patches in the superficial regions of the aerial organs of the dicotyledons. They provide sufficient strength to the growing organs.

Answer 2

Answer:

ADVERTISEMENTS: The most important mechanical tissues are sclerenchyma fibres with highly lignified walls and peculiarly interlocked ends, sclereids, with massive lignified walls, and collenchyma with unevenly thickened cellulose walls. ... Sclereids may occur in different parts of the plants for the same purpose.