Ch. 12 Biodiversity and Classification Flashcards Preview

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Flashcards in Ch. 12 Biodiversity and Classification Deck (23):
1

bioprospecting

hunt for new organisms and new uses of known organisms

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biodiversity

variety within and among living species

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systematists

scientists specialized in describing and categorizing a particular group of organisms

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discovering new species

must be clearly distinguished from similar species and be published in a professional journal. must also collect individual specimens for storage in a specialized museum

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Natural history museum

storage of animal species collection

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herbaria

storage of plant species collection

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type-collection facility

storage of microbe and fungi species collection

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estimate of species

typical is 10 million known species

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geological periods

rise and fall of organism dynasties. defined by particular set of fossils

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domains

3 large groups of all modern species. unified by similarities in cell structure

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kingdoms

smaller groups within domains

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cenozoic

quaternary- modern organisms
tertiary-1.8 mammals birds and flowering plants

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mesozoic

cretaceous-65 massive carnivorous and flying dinos
jurassic-144 huge plant eating dinos
triassic-206 early dinos mammals on land "life restarts"

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plaeozoic

permian-251 early reptiles on land
carboniferous-290 land dominated by dense forests
devonian-354 age of fishes
silurian-408 life invades land (soft bodied animals, seedless plants, and insects)
ordovician-439 life diverse in ocean
cambrian-495 all modern animal groups appear in oceans

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pre-cambrian

543-single celled organisms in ocean
4500-formation of earth. first organisms and primitive bacteria appear within 1000 million years

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domain eukaria

all organisms contain eukaryotic cells. plantae, animalia, fungi, and protista

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kingdom plantae

multicellular, make own food, largely stationary. 300.000 known species

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kingdom animalia

multicellular, rely on others for food, mobile at least part of life cycle. 1,000,000 species

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kingdom fungi

multicellular, rely on others for food, reproduce by spores, body made by thin filaments hyphae. 100,000 species

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kingdom protista

mostly single celled, plant-like, fungus-like, and animal-like types. 15,000 species

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domain bacteria

prokaryotes with cell wall containing peptidoglycan

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kingdom bacteria

mostly single celled. some form permanent aggregates of cells. 4,000 species

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domain archae

prokaryotes without peptidoglycan and similarites to eukaryotes in genome organization and control. 1,000 species