Either the cell membrane, or the cell wall. The cell membrane is most common in animals, and protists, whereas some monerans, and most plants and fungi have a cell wall.
The layer that covers Earth's surface is called the crust. It is the outermost and thinnest layer of the Earth, ranging from about 5 to 70 kilometers thick beneath the oceans and continents, respectively.
The protective layer that covers the surface of a plant to prevent water loss is called the cuticle.
Endoplast
There is a thin layer of ozone that covers entire surface. It is called ozone layer and protect us too.
No, the apical surface of the epithelium is not the deepest layer of cells; rather, it is the outermost layer that faces the lumen or external environment. The deepest layer of epithelial cells is referred to as the basal layer, which rests on the basement membrane. The apical surface is involved in functions such as absorption, secretion, and sensation, depending on the type of epithelium.
epidermis
its the cuticle
crust
Cortex
The outer layer of roots and stems, called the epidermis, develops from the protoderm, which is one of the three primary meristems in plant growth. The protoderm gives rise to the outer protective layer of cells that covers the plant's surface.
The layer of the sun's atmosphere composed of granular cells is the photosphere. This is the visible surface of the sun where energy is emitted in the form of light and heat. Granular cells are convective cells of gas that transport heat from the sun's interior to the surface.
The Epidermis