BISC 110 Chapter Notes -Endosymbiont, Streptomycin, Encase

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Taxonomy: the branch of biology that names and classifies species: the three domains of life are bacteria, archaea, and eukarya. Prokaryotic = most are single-celled and microscopic: eukaryotes = organisms with eukaryotic cells. This domain includes three kingdoms of multicellular eukaryotes: kingdoms plantae, Descent with modification = contemporary species arose from a succession of ancestors. Because natural environment selects for propagation of certain traits among naturally occurring variant traits in the population: common ancestor/ancestral species give rise to two or more descendant species. One species could gradually radiate into multiple species as the geographically isolated populations adapted over many generations to different sets of environmental factors. Stromatolites: layered rocks that form when certain prokaryotes bind thin films of sediment together: geological record of earth"s history is split into three eons archaean, proterozoic and. Phanerozoic, eon when most animals existed, is divided into three eras paleozoic, mesozoic and.

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