20 is the Number of Neutrons of potassium.
There is a place in the lid where the fluid rushes to when you tip it, leaving the air bubbles in the cylinder of the bottle. In some companies it's a chemical inside the fluid that can evaporate over time and looses it's " magic" effect.
Answer:
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Explanation:
C would be the answer,you have cells in every part of your body.
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Phospholipid can occur in a polar cell.
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