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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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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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The horizontal fraction bar was introduced by the Arabs.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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People about to have surgery must tell their health care providers about all supplements they take.