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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.
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Illicit drug use costs the United States approximately $181 billion every year.
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There are approximately 3 million unintended pregnancies in the United States each year.
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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