Answer:
For a limb to regenerate, you need bone, muscle, blood vessels and nerves. There are adult stem cells, a kind of undifferentiated cell that can become specialized, that regenerate muscle, but they don't seem to activate.
I think it is C, but I could be wrong because I am taking an educated guess.
Leukemia can be treated using human stem cells to attack and destroy cancer cells.
Answer:
Metamorphic rock.
Explanation:
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