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Author Question: A condition or event that an experimenter varies to see its impact on another variable is called ... (Read 34 times) |
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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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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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort
Diphtheria. The bacteria that cause this disease, called Corynebacterium diphtheriae, proliferate in