DNA evolved pretty directly from RNA. We know the oldest life forms on earth were RNA based just as we (and everything else on earth excluding some microorganisms and viruses) are DNA based.
Before the evolution of DNA there was an entire world of living things using RNA to carry their genetic sequence (instead of using it for the building the replication of that sequence the way we do). DNA came about the same way most forms of evolution do; random chance that was then positively selected for due to offering a survival advantage. The advantage of DNA over RNA is clear. It degrades less rapidly, it’s less prone to error, and most of all it allows for much longer and more sophisticated sequencing.
There are mysteries around DNA that science still hasn’t answered. But it’s very existence is evidence that evolution is real and has been since the beginning of life on earth.
DNA evolved pretty directly from RNA. We know the oldest life forms on earth were RNA based just as we (and everything else on earth excluding some microorganisms and viruses) are DNA based.
Before the evolution of DNA there was an entire world of living things using RNA to carry their genetic sequence (instead of using it for the building the replication of that sequence the way we do). DNA came about the same way most forms of evolution do; random chance that was then positively selected for due to offering a survival advantage. The advantage of DNA over RNA is clear. It degrades less rapidly, it’s less prone to error, and most of all it allows for much longer and more sophisticated sequencing.
There are mysteries around DNA that science still hasn’t answered. But it’s very existence is evidence that evolution is real and has been since the beginning of life on earth.