AP BIOLOGY

Detailed explanation-1: -Plasma membrane is the outermost protective layer in cells of all plants and animals.

Detailed explanation-2: -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-3: -The outermost layer of a cell membrane is the middle lamella and hence it is also said to being the outermost membrane of a cell. It is made up of calcium and magnesium pectate.

Detailed explanation-4: -The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions.