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21 Cards in this Set
- Front
- Back
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Formation of the Primordial Soup
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Reducing Atmosphere (miller urey experiment), Deep sea vents, and Extra terrestrial
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Formation of Organic Polymers
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Clay surfaces may have served as templates against which the first RNA was formed.
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Formation of Protobionts
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Pre-Cells were Amino Acids contained within a phospholipid boundary.
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Chemical Selection
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New protobionts with enhanced enzymatic or replicating abilities favored.
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RNA --> DNA
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Allowed separation of information (DNA) and catalytic (proteins) functions.
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Timeline for life on earth
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Hadean
Archean Proterozoic Phanerozoic |
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Major Events of the Precambrian
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Origin of prokaryotes, photosynthesis, and oxygen increased in the atmosphere. Also the origin of eukaryotes and multicellular organisms
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Major events of the Cenozoic era
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Coevolution of insects and flowering plants. Appearance of hominids
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Major Events of the Mesozoic era
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Radiation of gymnosperms, dinosaurs, and mammals
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Major Events of the Paleozoic era
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Emergence of life on land and Cambrian explosion
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Cambrian Explosion
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Rapid appearance and diversification of phyla at the start of the Paleozoic era
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Duoshunto Fossils
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Southern China formation of microscopic fossils of tiny sponge embryos
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Eidacaran Fossils
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Southern Australian sponges, jellies, comb jellies, burrows and tracks
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Burgess Shale Fossils
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British Columbia jellies and brand new animals with eyes, mouths, limbs, shells, and feeding appendages.
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Permian Extinction
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Largest mass extinction because of Pangea formation
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Crutaceous Extinction
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Dinosaurs and marine animals died out. Massive meteor impact at the Yucatan Peninsula.
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Hadean
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Formation of earth, primordial soup, and protobionts
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Archaen
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Origin of life, radiation of prokaryotes
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Proterozoic
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Origin and radiation of eukaryotes and simple multicellular organisms
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Phanerozoic
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Radiation and diversification of complex organisms
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Hadean + Archaen + Proterozoic = Precambrian
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Phanerozoic = Cambrian
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