This is a really tough question. Extinction is
when a genetically unique group is no longer in
existence. It is more likely, in the way I
understand your question that the earliest
organism actually evolved into a genetically
similar, yet maybe physically different looking
That depends on your definition of
The first organism had
descendants, these being the other organisms.
These new organisms evolved, so that they were
different from their ancestor. No organism today
is the same as that ancestor, so we could say that
it is extinct, or that its form and biochemistry
are extinct, because nothing alive today has them.
But, all organisms today carry on that ancestor's