The sexual theory of cell evolution has clear corollaries. All higher life would be initially sexual, and of two types (A- or Eu-karyotes). Relations would be dynamic with alternative unions and dissolution of the union of the two constituent moneric species, even as their viability as free-living species tended to decline in subsequent evolution. Superior bioenergetics meant eukaryotes were retained in multicellular species. However, some a-karyotes would be phylogenetically older than eukaryotes, a point which if verified, would render such biota of fundamental significance.