NATS 1675 Lecture Notes - Lecture 8: Ardi, Aegyptopithecus, Foramen Magnum
21 Nov 2017
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Document Summary
It is believed that a marriage of convenience occurred in the primitive oceans between some prokaryotic cells and evolving eukaryotic cells. An association between members of two or more different species. ] Marriage was the result of ingestion of prokaryotes by primitive non- oxygen-adapted eukaryotes, but without digestion. Eventually the relationship became one of mutualism, i. e. , beneficial to both species. Some species of prokaryotes (blue-green algae) now had the ability to produce oxygen through the photosynthesis. The primitive eukaryotes benefited by incorporating the symbiotic bacteria"s ability to make use of the increasing oxygen content of the earth"s ocean and atmosphere. In return the union ensured the ingested bacteria of a constant food supply. The following overhead summarizes recent evidence as to the evolution of prokaryotes and eukaryotes. Remember mitochondria are the primary source of cellular energy; and plastids (e. g. , chloroplasts) are pigmented organelles found in plants vital in photosynthesis.
