The second is simple life to complex life, "macroevolution" if you want to contrast it with macroevolution. And the fact is that the distinction is false. Everyone who accepts evolution, which is everyone who matters, accepts that the distinction between micro and macro is false. There is no mechanism which prevents evolution at the micro level progressing to speciation. Nope, this is not evolutions challenge. Any way that life starts, including some kind of Godly hand-waving, entails evolution thereafter. If you have life, you have evolution. If you don't have life, then you don't have evolution. Any more than you have window cleaners without windows.