Well Watson chose to bring up the subject of DNA in an article on Darwin. Now we can't ask how it evolved? Also doesn't DNA's ability to replicate itself depend on RNA and how did these two co-evolve?
"Well Watson chose to bring up the subject of DNA in an article on Darwin. Now we can't ask how it evolved? Also doesn't DNA's ability to replicate itself depend on RNA and how did these two co-evolve?"
Of course you can ask how DNA "evolved". But DNA wasn't identified as the carrier of genetic information until long after Darwin. All DNA work supports Evolution.
Strictly speaking, at least in procaryotes, DNA replication does not involve dependence on RNA, unless you consider that all cell processes are RNA dependent in a very indirect manner (in this case it is indirect since the DNA polymerase is a protein and involves rRNA, tRNA and mRNA to produce the enzyme, but the actual replication of DNA can be done in a test tube with only DNA polymerase and a DNA template and the appropriate nucleotides in the right form).