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17 Cards in this Set

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unicellular
one-celled
multicellular
more than one cell
heterotrophic
an organism that needs to eat in order to live
autotropic
an organism that makes its own food
eukaryotic
cell with a true nucleus
prokaryotic
without a nucleus in the cell
aerobic
organism needing oxygen in order to live
anaerobic
organism that does not need oxygen in order to live
fission
simplest form of asexual reproduction.
flagella
a long, thin, whiplike structure of some protists that helps them move through moist or wet surroundings
antibiotic
chemicals produced by some bacteria that are used to limit the growth of other bacteria.
saprobe
organism that feeds on dead or decaying tissues of other organisms
nitrogen fixing bacteria
bacteria which change nitrogen gas into a form of nitrogen that plants can use.
pathogen
disease producing organism
toxin
poisonous substance produced by some pathogens
endospore
thick-walled, protective structure produced by a pathogen when conditions are unfavorable for survival.
vaccine
preparation made from killed bacteria or damaged particles from bacterial cell walls that can prevent some bacterial diseases