AP BIOLOGY

Detailed explanation-1: -The epidermis is the outermost cellular layer of the plant body. Generally, it consists of a single layer of epidermal cells. But in case of some xerophytes like Nerium, multiple epidermises made up of many layers, thick epidermal cells are present. So the correct option is ‘ Nerium’.

Detailed explanation-2: -Just like human skin, the leaves of plants have an outer layer called the epidermis. In plants the epidermis is made up of a single layer of cells. If we cut across a leaf and zoom in, we can see the area between the upper and lower epidermis. This area, called the mesophyll, consists of several layers of green cells.

Detailed explanation-3: -The plant epidermis is a single layer of clonally related cells. Plant epidermis fulfils a basic protective function, but specialised cells within the epidermis have specific roles.

Detailed explanation-4: -The basal cell layer (stratum basale, or stratum germinosum), is a single layer of cells, closest to the dermis.

Detailed explanation-5: -The plant epidermis consists of three main cell types: pavement cells, guard cells and their subsidiary cells that surround the stomata and trichomes, otherwise known as leaf hairs. The epidermis of petals also form a variation of trichomes called conical cells.