When a Researcher Transplanted the Nucleus of an Intestinal Cell

When a researcher transplanted the nucleus of an intestinal cell from a tadpole into an egg cell whose nucleus had been destroyed, the egg developed into a normal frog. This illustrates that

A) scientists can clone a human by putting one of his or her nuclei into an egg cell.
B) the homeobox genes in a transplanted nucleus undergo mutation.
C) genes are gained during the process of differentiation.
D) each cell of an organism has all the genes needed for development.
E) a nucleus that is removed from its normal location is influenced by adjoining cells.

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