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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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Medication errors are three times higher among children and infants than with adults.
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Blood is approximately twice as thick as water because of the cells and other components found in it.