Invelisul chitinos reprezinta exoscheletul:
a. coralilor b. melcului-de-gradina. c. paianjenul. d. scoicii-de-lac.

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consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.