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Stem cells are a class of undifferentiated cells that are able to differentiate into special cell types.
They are important because they represent an area in medicine, because they have the potential to regenerate and repair damaged tissue.
Not all stem cells come from embryos but also bone marrow, your teeth and other places.
During World War II, the federal government controlled the prices of goods, wages, and war-sensitive materials, like fuel and steel
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