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20 Cards in this Set
- Front
- Back
extemophiles
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archaebacteria because they live in extremely acidic, hot, or salty environments
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What are the 3 shapes fo bacteria?
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bacillus, coccus, spirillum
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are most bacteria heterotrophic or autotrophic?
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heterotrophic
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decomposers
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feed on dead organic matter and release nutrients locked in dead tissue
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are bacteria prokaryotes or eukaryotes?
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prokaryotes
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example of gram positive cocci:
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Streptococcus, Micrococcus gluteus, Staphylococcus, Enterococcus faecelis, S. epidermis
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examples of gram + rods
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Bacillus megatrium
Bacillus subtilis Bacillus cereus Lactobacilus acidophilus |
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example of gram - rods
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Escherichia coli, Serratia marcasens
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example of spirillum
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Rhodospirillum rubium
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what is Bacillus megaterium?
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-Gram + bacillus
-large |
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What is Staphylococcus epidermis?
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-Gram + cocci
-among the normal flora of skin |
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nitrogen fixation
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transforming atmospheric nitrogen into other nitrogenous compounds that can be used as nutrients by plants
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Rhizobium nodules
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form because of a Rhizobium and host roots where nitrogen fixation takes place
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how does a sensitivity plate work?
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determines the effectiveness of an antibiotic
-if bacteria grows straight over the impregnated antibiotic then its resistant -if bacteria cannot grow on top of the antibiotic then the antibiotic is effective |
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what is the zone of inhibition?
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the area between the antibiotic and the bacterial growth on a sensitivity plate
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what are some Cyanobacteria?
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-Nostoc
-oscillatoria -gloeocapsa *all photosynthetic |
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Oscillatoria
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-filamentous (trichomes)
-reproduce with fragmentation |
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Nostoc
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2 cell types (vegetative/heterocysts)
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what occurs in the heterocysts of nostoc?
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nitrogen fixation
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Gloeocapsa
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small cells in a mucilagenous sheath
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