Other researchers have derived adult stem cells from sources such as fat cells and bone marrow, although scientists say these types of stem cells are not as useful as embryonic stem cells. In this case, scientists approached donors and informed them that their eggs and sperm would be use to give away embryos for stem-cell research. Embryonic stem cells can mature into any cell or tissue, and scientists say they may someday be used to repair or replace damaged tissue or organs for disorders such as Alzheimers, diabetes, cancer, Parkinsons and...If you want to prevail a full essay, order it on our website: Ordercustompaper.com
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