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Author Question: During puberty, hormonal activity: a. increases sharply. b. levels off. c. decreases sharply. ... (Read 66 times) |
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There are 20 feet of blood vessels in each square inch of human skin.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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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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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.