Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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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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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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There are more bacteria in your mouth than there are people in the world.
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There are more sensory neurons in the tongue than in any other part of the body.
Steps in the humoral and cell-mediated immune response
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A color-enhanced electron micrograph of circular plasmid molecules