EBio- Ch. 26 Vocab

EBio Ch 26 Vocab - other cellular structures were derived from small prokaryotes that had been engulfed by larger cells 1 Genetic Annealing The

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Chapter 26: The tree of Life: An introduction to Biological Diversity Protobiont An aggregate of abiotically produced molecules surrounded by a membrane or membrane-like structure. Ribozyme An enzyme-like RNA molecule that catalyzes reactions during RNA splicing. Radiometric Dating A method paleontologists use for determining the ages of rocks and fossils on a scale of absolute time, based on the half-life of radioactive isotopes. Half-Life The number of years it takes 50% of a sample of an isotope to decay. Magnetic Reversal A reversal of the polarity of Earth’s magnetic field. Stromatolite Rocklike structure composed of layers of prokaryotes and sediment. Serial Endosymbiosis A model of the origin of eukaryotes consisting of a sequence of endosymbiotic events in which mitochondria, chloroplasts, and perhaps
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Unformatted text preview: other cellular structures were derived from small prokaryotes that had been engulfed by larger cells. 1 Genetic Annealing The production of a new genome through the transfer of part of the genome of one organism to another organism. Snowball Earth Hypothesis The hypothesis that glaciers covered the planet's landmasses from pole to pole 750-570 million years ago, confining life to very limited areas. Pangaea The super continent formed near the end of the Paleozoic era when plate movements brought all the landmasses of Earth together. Three-Domain System A system of taxonomic classification based on three “super kingdoms”: Bacteria, Archaea, and Eukarya. 2...
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This note was uploaded on 04/30/2008 for the course EBIO 1220 taught by Professor Demig-addams during the Spring '07 term at Colorado.

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EBio Ch 26 Vocab - other cellular structures were derived from small prokaryotes that had been engulfed by larger cells 1 Genetic Annealing The

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