Originally Posted by Crowbar
and there is no indication that there are orders of magnitude more non-junk coding in multicellular organisms' cells.
Ah, but there lies part of it. The differences in amount of "non-junk" might not be a good measure of the difference in complexity between the non-junks. I'm not just really thinking about morphology, but all the other things involved, timed apoptosis (cell death) for example, differenciation and precise population size for different cell types and so forth.