AP BIOLOGY

Detailed explanation-1: -The epidermis is the protective outer layer of clonally related cells covering all plant organs. It is composed of a number of specialised cell types which differentiate from the basal epidermal cell in adaptively significant frequencies and patterns.

Detailed explanation-2: -Root hairs are unicellular and thin walled out growths of the epidermis, which is the outer most layer of root.

Detailed explanation-3: -The stratum corneum is the outermost layer of the epidermis and is composed of dead scale-like cells that become progressively flattened and joined together.

Detailed explanation-4: -Some root epidermal cells of plants produce root hairs, the tubular outgrowths that increase the surface of the roots. The epidermal cells of roots that produce root hairs are called trichoblasts, whereas epidermal cells without the capability of root hair formation are called as atrichoblasts.