Cell jobs changes

Mansoor jacktow at hotmail.com
Tue Apr 15 19:04:22 EST 2003

Hello everybody,

I have some question about human cells. First one is that Can a cell's
job be changed so that can take another dead cell's job ? and the
second one is that How can different cells in a same body be different
while they have the same genetic ?

Thanks in advance.

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