Original Cell?

The living cells of all living organisms are apparently related. Each shares the same genetic code, which in certain respects, is an arbitrary code. It would be very unlikely that the same language would develop in two completely isolated societies. Since the language of genetics is the same for all higher flower and fauna, it is likely that it represents a single culture of creation. Many very different forms of life might have existed with somewhat different codes or completly different mechanisms, but so far, we have failed to discover them except within our own cells..

Mitocondria, which live in animal cells, and Cloroplasts which live in plant cells, might once have lived independant from higher cells. They exhibit slightly differing genetic codes and mechanisms, but not different enough to suggest a completly separate origin.

A single thead, back to most resent original cell, does not suggest that that cell was not itself, the culmination of prior evolution that might had in it's culture, an original cell. There is a new original cell for every birth.

The development of sexuality gives each new individual organism it's own perpective the first cell-- the common ancestor of their mother and father, or the first of their speices.

We may not agree who Adam and Eve were or which first cell constituted life. But we can see that it is the nature of cells to multiply and change. Given the conditions we obeserve, going back it time, then number of cells existing can be divided down to one.

We cannot know exactly what conditions existed three billion year ago, or how condition may have changed exactly. We cannot say for sure that there was a single first cell. What we can say is that all living cells are most likely part of a single life organism which represents a single intance of the emergence of life on the planet earth.