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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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.