Comment Archaic Leftover? (Score 1) 62
We inherit a vast majority of our genes and genetic patterns from our archaic forebears; in humans, many of these older systems are turned off, in effect. This is not news. What use these genes may have had in extinct life forms hundreds of millions of years old is open to question, as is the potential evolutionary usefulness of reusing simple cellular material. In other words, single-cell organisms or those made up of semi-specialized groups of cells may have used these genes to "come back to life" if and when external conditions allowed. If the presence of these inactive genes in modern animals causes no ill evolutionary effect, they may remain in our DNA, doing their work after the possibility of evolutionary change goes away in biological death.
In a sense, biological death may precede biochemical death by quite a long time.