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11 Cards in this Set
- Front
- Back
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Protobiont
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An aggregate of abiotically produced molecules surrounded by a membrane or membrane like structure
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Ribozymes
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An enzyme-like RNA molecule that catalyzes reactions during RNA splicing
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Radiometric Dating
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A method paleontologist use for determining the ages of rocks and fossils on a scale of absolute time based on the half-life of radioactive isotopes.
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Half-Life
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The number of years it takes for 50% of a sample of an isotope to decay
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Magnetic Reversal
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A reversal of the polarity of earths magnetic field
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Geologic Record
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The division of earths history into time periods, grouped ito three eras: Archaean, Proterozoic, Phanerozoic and further subdivided into eras and epochs
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Serial Endosymbiosis
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A model of the orgin of eukaryotes consisting of a sequence of endosymbiotic events in which mitocondria, chloroplasts and perhaps other cellular structures were derived from small prokaryotes that had been engulfed by larger cells
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Genetic Annealing
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The production of new genome through the transfer of part of the genome of one organism to another organism
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Snowball Earth Hypothesis
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The hypothesis that that glaciers cover the planets landmasses from pole to pole 750-700 MYA, confining life to a very
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Pangea
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The supercontinent formed near the end of the paleozoic era when plate movement brought all the landmasses of earth together
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Three Domain System
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A system of taxonomic classification based on three "superkingdoms" Bacteria, Archaea, Eukarya
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