When can a stem cell become another cell type?
A.When it divides.
B.When it combines with another stem cell.
C.When one takes a certain drug.
D.When one is in good health.
正确答案是A
When can a stem cell become another cell type?
A.When it divides.
B.When it combines with another stem cell.
C.When one takes a certain drug.
D.When one is in good health.
正确答案是A