What structural parts do the bodies of unicellular and multicellular organisms consist of?

What structural parts do the bodies of unicellular and multicellular organisms consist of? Prove that the amoeba consisting of only one cell is ordinary and such a multicellular animal, like a grass frog, are independent organisms.

The similarity between unicellular and multicellular organisms is that they both consist of a cell. It has a similar chemical composition and a similar structure (organoids) in both representatives; in both of them, the cell divides during reproduction (two daughter cells are obtained from the mother), the metabolism and vital processes are similar.
These organisms differ in that in a unicellular (amoeba) cell, it performs all the functions necessary for life itself. That is, it provides breathing, nutrition, excretion, irritability, growth. In a multicellular organism (frog), cells by similar functions are combined into tissues, tissues into organs, and the organs themselves are interconnected by nervous and humoral regulation.

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