LAB__4_-_Domain_Bacteria

LAB__4_-_Domain_Bacteria - THREE-DOMAIN SYSTEM PROKARYOTIC...

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THREE-DOMAIN SYSTEM
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PROKARYOTIC DOMAINS 1. Domain BACTERIA Cyanobacteria and Eubacteria 2. Domain ARCHAEA strict anaerobs thermoacidophiles, extreme halophiles, methanogens Prokaryotes or unicellular organisms
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Characteristics of bacterial cells
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CYA NO BACTERIA or Blue - green Algae Photoautotrophs; photosyntetic bacteria ( Chl a ) Solitary or colonial (filamentous colonies) • N 2 -fixation in heterocysts of Anabaena and Nostoc Reproductive cells akinetes in Anabaena
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Anabaena sp.
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spherical (coccus), rod-shaped (bacillus), and spiral-shaped (vibrio, spirillum, spirochaeta) aerobic, anaerobic or facultative anaerobs Gram-positive or Gram-negative Commensal , mutualistic or pathogens Lactobacillus acidophilus – normal inhabitants of our digestive tract (normal gut flora) Escherichia and Bacteroides in our intestine vitamin K soybean root nodules containing billions of Rhizobium N 2 -fixation Streptococcus pneumoniae causes pneumonia,
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LAB__4_-_Domain_Bacteria - THREE-DOMAIN SYSTEM PROKARYOTIC...

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