Respuesta :
My guess would be A. B isnt right because you dont need a whole organ to grow an organ, but just a few of its cells. C isnt good either because you can control what stem cells will develop into by taking a cell from whatever is need, and d just doesnt make sense to me.
Stem cells have the ability to become other cells and also tissues. These functions occur after cell division after a long period of. Research has been done to determine the effect of stem cells. Stems have not been used for a long period of time for research to determine what will happen after a long period of time and to analyze it. The disadvantage is long-term effect of the stems being completely unknown. Once trials have been demonstrated for the stems for a long period of time, this disadvantage will be erased.