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In recent times, it has been shown that adult cells can be induced to become embryonic stem cells also
called "induced pluripotent stem cells" (iPS). To make this conversion, what has been done to the adult
cells?
a- cytoplasm from embryonic stem cells is injected into the adult cells.
b- The nucleus of an embryonic stem cell is used to replace the nucleus of an adult cell.
C- The adult cells must be fused with embryonic stem cells.
d- New genes are added to the adult cell to convert it to an embryonic stem cell.