Similarities — whether of DNA, anatomy, embryonic development, or anything else — are better explained in terms of creation by a common Designer than by evolutionary relationship. The great differences between organisms are of greater significance than the similarities, and evolutionism has no explanation for these if they all are assumed to have had the same ancestor. How could these great gaps between kinds ever arise at all, by any natural process?  
  
  
Yeah, a single creator made it all, all right. Gadda love the self induced frontal lobotomy.