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Author Question: According to research, what percentage of 9th graders have had sex? A) 32.9 B) 44.1 C) 53.2 ... (Read 48 times) |
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.