In phylogenies based on rRNA their representatives were separate from other amoebae, and appeared to diverge near the base of eukaryotic evolution, as did most slime molds.

These groups appear near the base of eukaryotic evolution on rRNA trees.

The intimate relationship between tyrosine kinases and SH2 domains is supported by their coordinate emergence during eukaryotic evolution.

The plastid oxidase first evolved in ancient cyanobacteria and the alternative oxidase in proteobacteria before eukaryotic evolution and endosymbiosis events.

If, as evidence indicates, sexual reproduction arose very early in eukaryotic evolution, the essential features of meiosis may have already been present in the prokaryotic ancestors of eukaryotes.

The gene CDC7 appears to be conserved throughout eukaryotic evolution; this means that most eukaryotic cells have the Cdc7 kinase protein.

They were probably derived from small-molecule hydroxylases early in eukaryotic evolution.

How did the first living cells originate, clues provided by RNA, new paradigms in prokaryotic and early eukaryotic evolution.

From an evolutionary point of view, tropomyosins in higher eukaryotes are notable in retaining all 4 of the potential genes produced by the dual genomic duplication event that took place in early eukaryotic evolution.

The detection of multiple members of the p24 family in the early branching eukaryotes such as Cryptosporidium parvum and kinetoplastids suggests that some of this diversification was probably already under way early in eukaryotic evolution.