In article <1993Apr19.141629.22806 at yang.earlham.edu> derekr at yang.earlham.edu writes:
>I was wondering...which evolved first, RNA or DNA? I would think RNA
>would but a friend of mine said DNA evolved first but he couldn't remember
Lazcano, A. et al.
The evolutionary transition from RNA to DNA in early cells
J. Mol. Evol.