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Author Question: A(n)________ is the type of study in which one or more independent variables are manipulated to see ... (Read 537 times) |
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.