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Author Question: One of the major limitations of observational research methods is that ____. a. they are not cost ... (Read 31 times) |
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.