HORTICULTURE

Detailed explanation-1: -Sclerenchyma is composed of dead cells. They provide mechanical support. Therefore collenchyma is living and provides mechanical strength to the plants.

Detailed explanation-2: -Collenchyma tissue is composed by elongated living cells of uneven primary thick walls, which possess hemicellulose, cellulose, and pectic materials. It provides support, structure, mechanical strength, and flexibility to the petiole, leaf veins, and stem of young plants, allowing for easy bending without breakage.

Detailed explanation-3: -Sclerenchyma cells are specialized plant cells that exist to provide strength and support and are found at the stem, roots and even seed coats of some plants.

Detailed explanation-4: -Xylem provides maximum mechanical strength.

Detailed explanation-5: -Sclerenchyma is a plant tissue providing mechanical stiffness and strength. Fibres and sclereids are the main types of sclerenchyma cells. Most sclerenchyma cells show intrusive growth. The cell walls of sclerenchyma have thickened secondary layers made from cellulose, hemicelluloses and lignin.