Without an ozone layer this cell would receive heavy doses radiation from the sun- obviously this would kill it.
In addition to all of the other excellent responses in this thread,
Dosing of the first cell or pre-cells with radiation would have increased mutation/breakage/rearrangement rate in the nucleic acids of those cells, thus potentially accelerating evolution.
The most conservative estimates indicate that random mutations of the chimp genome to that of Homo Sapiens would take some 100 million generations or something on the order of a billion years.
Would you explain how these estimates were made? Or provide an accessible source that describes them?
I provided three references in an earlier posting 02/16/05.
I know you did. You listed a 17-year-old popular press article, a textbook, and a popular religous pseudoscience book.
That's why I asked for the calculations. If you can't describe the calculations and their underlying assumptions, you shouldn't be arguing in their favor.