Select the reasons why adult stem cells might be better for use in stem cell therapy than embryonic stem cells?
1) Adult stem cells can be obtained from the patient's own body, reducing the risk of rejection.
2) Adult stem cells have a lower risk of forming tumors compared to embryonic stem cells.
3) Adult stem cells have a higher potential for differentiation into specific cell types.
4) Adult stem cells are ethically less controversial than embryonic stem cells.