(A) Archaezoan hypothesis. (B) Symbiotic hypothesis. The shapes within the eukaryotic cell denote the nucleus, the endomembrane system, and the cytoskeleton. The irregular gray shape denotes a ...
The functional period of eukaryogenesis started just prior to the symbiosis between two prokaryotes and ended when the last common ancestor of modern eukaryotes arose. During this time, many of the ...
View Full Profile. Learn about our Editorial Policies. Current hypotheses suggest that all life on Earth evolved from a common ancestor that diversified into the variety of organisms seen today.