How do phospholipids naturally arrange themselves into membranes just because of their shape ?

The hydrophilic (polar) group and hydrophilic tails (fatty acids change)are depicted in the single phospholipid molecule.

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becuase they move around

i got no brains

Explanation:

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

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.