Explain how specific epithelium are name?
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Explanation:

Most epithelial tissue is described with two names. The first name describes the number of cell layers present and the second describes the shape of the cells. For example, simple squamous epithelial tissue describes a single layer of cells that are flat and scale-like in shape.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%