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Author Question: Cell membranes are said to be ________ because they allow some substances to pass but not others. (Read 42 times) |
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.