Yes they have a purpose, and it depends about what you are asking for the multiples.Stem cells are pretty much cells that aren't really specialized in anything, BUT they can become almost any sort of cell.(ie. brain stem cell) So if you're asking in terms of 2 different kinds of stem cells that change, thats not right, but they turn into any cell so technically yes they are multiple.
Yes they have a purpose, and it depends about what you are asking for the multiples.Stem cells are pretty much cells that aren't really specialized in anything, BUT they can become almost any sort of cell.(ie. brain stem cell) So if you're asking in terms of 2 different kinds of stem cells that change, thats not right, but they turn into any cell so technically yes they are multiple.
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