Steven B. Harris <sbharris at ix.netcom.com> wrote in article
<6raqbi$5kq at sjx-ixn3.ix.netcom.com>...
>> Obviously it's achievable. There are immortal plants (aspens) and
> animals (corals, maybe even lobsters). Their mitochondria obviously
> don't give them any problems, and they don't get new ones from Mars.
> Whether old mitochondria are repaired, or just produced anew and free
> of defect at a sufficient pace, is immaterial. For the cell, it's
> repair either way. Any process that makes new fresh cell organelles
> counts as "cell repair" in my book.
>>> What about the possibility of a selection process - with defective cells
being weeded out? Non dividing cells can't afford to weed out.
Kate
