Its not part of evolution but three scientists at Cambridge did a twist on the Miller Urey experiment. They concluded that, within the Hadean earth (3.8 to 4.5 Billion years), the planet was undergoing
1Maximum bombardment by comets and planetessimal chunks
3The earth was anoxic
So, they reasoned that the atmosphere was full pf Hydrogen cyanide (common compound in carbonaceous chondrite meteorites);Hydrogen Sulfide and Sulfuric acid (from volcanoes, and the H2SO4 was the result of SO2 hitting the water vapor)
They exposed this to ultraviolet radition and electrical discharges and then let this go for 10 days (they wanted to keep everything in decimal equivalents of cgs)
They discovered that the following things were produced
1prebiotic chemicals like amino acids, enzymes, and nucleotides including CATG.
Sounds like they created a "prebiotic chemical toolkit" waiting for some sprk to ignite life.
Remember that there exits DNA containing life forms (the protists) THAT do not contain nuclei.