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20 Cards in this Set

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  • Back
extemophiles
archaebacteria because they live in extremely acidic, hot, or salty environments
What are the 3 shapes fo bacteria?
bacillus, coccus, spirillum
are most bacteria heterotrophic or autotrophic?
heterotrophic
decomposers
feed on dead organic matter and release nutrients locked in dead tissue
are bacteria prokaryotes or eukaryotes?
prokaryotes
example of gram positive cocci:
Streptococcus, Micrococcus gluteus, Staphylococcus, Enterococcus faecelis, S. epidermis
examples of gram + rods
Bacillus megatrium
Bacillus subtilis
Bacillus cereus
Lactobacilus acidophilus
example of gram - rods
Escherichia coli, Serratia marcasens
example of spirillum
Rhodospirillum rubium
what is Bacillus megaterium?
-Gram + bacillus
-large
What is Staphylococcus epidermis?
-Gram + cocci
-among the normal flora of skin
nitrogen fixation
transforming atmospheric nitrogen into other nitrogenous compounds that can be used as nutrients by plants
Rhizobium nodules
form because of a Rhizobium and host roots where nitrogen fixation takes place
how does a sensitivity plate work?
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
what is the zone of inhibition?
the area between the antibiotic and the bacterial growth on a sensitivity plate
what are some Cyanobacteria?
-Nostoc
-oscillatoria
-gloeocapsa
*all photosynthetic
Oscillatoria
-filamentous (trichomes)
-reproduce with fragmentation
Nostoc
2 cell types (vegetative/heterocysts)
what occurs in the heterocysts of nostoc?
nitrogen fixation
Gloeocapsa
small cells in a mucilagenous sheath