AP BIOLOGY

Detailed explanation-1: -Collenchyma. Collenchyma cells have thick walls that are especially thick at their corners. These cells provide mechanical support for the plant.

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 is an example of a simple permanent but dead mechanical tissue. It does not have a living protoplast. It has a cell wall that is made up of cellulose and lignin. It provides mechanical support to the plant.

Detailed explanation-4: -Sclerenchyma is a dead mechanical tissue.

Detailed explanation-5: -Sclerenchyma are composed of long, narrow cells. This provides strength to plant parts.