AP BIOLOGY

Detailed explanation-1: -Final answer: The flexibility in plants is due to Collenchyma tissue.

Detailed explanation-2: -Collenchyma is a type of permanent tissue. It allows easy bending of plant parts without their breakage. It provides mechanical support to plants thus it provides flexibility to plants. It is present in leaf stalks below the epidermis.

Detailed explanation-3: -Collenchyma tissue is specialised to provide flexibility to various parts of the plant like petiole and stem since they are non lignified. It allows for easy bending without breakage.

Detailed explanation-4: -Collenchyma is a simple permanent tissue of refractile non-lignified living cells which possess pesto-cellulose thickenings in specific areas of their walls. The cells are often elongated. They are circular, oval, or angular in the transverse section.

Detailed explanation-5: -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.