Question

Which one is main mechanical tissue of the plant

Answer 1

Collenchyma is the mechanical tissue that is made up of elongated cells with thick flexible cell walls. 

Collenchyma, in plants, has thick deposits of cellulose in their cell walls and appear polygonal in cross-section.

Here, the strength of the tissue results from these thickened cell walls and the longitudinal interlocking of the cells.

Also, this may form cylinders or occur as discrete strands and is one of the three ground, or fundamental, tissues in plants, together with parenchyma and sclerenchyma.