ABSTRACT
In this chapter, the three major superkingdoms of cellular life are discussed, and some of the similarities and differences between members of each group are considered. Several of the factors, processes, and structures that influenced the rate of cellular evolution are explored, and the kinetics of the superkingdoms’ evolution is reviewed. In addition, the process by which prokaryotic cells may have evolved into eukaryotic cells is outlined. Throughout the chapter, important landmarks in prokaryotic and eukaryotic evolution are emphasized, and some of the most significant prokaryotic and eukaryotic cells to emerge in the history of life are examined. The effects that unusual cells had on the evolution of the biosphere and the trajectory of the evolution of life are also considered.
