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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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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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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.