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Author Question: After 20 years the boys are contacted by a researcher who is conducting a study on twins separated ... (Read 10 times) |
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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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 occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.