The All-New All-Electric Nissan ARIA

A species that's mainly reproducing or totally reproducing asexually and just making clonal copies will tend to build up loads of mutations. Over time, worse mutations accumulate in the asexual species who do not diversify via sexual recombination. They don't purify through purging harmful mutations via sexual reproduction either. And in fact, the authors here specifically mentioned that sexual reproduction enhances the efficiency of purifying selection. This is fascinating. It does seem to give us some interesting evidence to back up some of these ideas, though, of course, also raising additional questions about what exactly is going on.