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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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There are more bacteria in your mouth than there are people in the world.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.