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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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.