Calculate a * b
Calculate a * bCorrect answers: 27
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Stem cells culturedIn 1997, it was announced that for the first time human stem cells had been cultured in a laboratory, using tissue taken from aborted human embryos. Stem cells are the basic, unspecialized cells from which all other cells in the body develop during the growth of a baby in the womb. The announcement was made at an international symposium on the ethics of human cloning and stem cells. The team of researchers at the Johns Hopkins University, Baltimore, was led by Dr. John D. Gearhart, a professor of gynecology and obstetrics. He issued the "progress report" of his research before it had been published, he said, to spark discussion about establishing guidelines for the ethical use of such cells. |