Prokaryotic Cells

Prokaryotic Cell Shapes Bacillus Coccus Spirillus

Prokaryotic Nucleoid: Prokaryotic “Chromosome” (and Plasmids)

Prokaryotic Cell Division: “Binary Fission”

Gut Bacteria: Escherischia coli

Gut Bacteria: Lactobacillus acidophilus Lactose (Milk Sugar)Lactic Acid Fermentation

Gut Bacteria: “Ruminants” “Rumen”

Pathogenic Bacteria: Bacillus anthracis

Streptococcus pyogenes Pathogenic Bacteria: Streptococcus pyogenes

Borrelia burgdorferi Pathogentic Bacteria: Borrelia burgdorferi

Pathogenic Bacteria: “STD’s” Syphillus Gonorrhoea Chlamydia

Pathogenic Bacteria: Xanthomonas

Photosynthesizers: Anabaena (Cyanobacteria) Light Energy

Chemical Energy Chemosynthesizers Tube Worms Symbiotic Bacteria Deep Sea Vent

Decomposers

Nitrogen Fixers: Rhizobium Nitrogen Fixation: N2N2 NH 4 + Alfalfa

Nitrogen Recyclers: Nitrosomonas, Nitrobacter NH 4 + NO 2 - NO 3 - AmmoniumNitriteNitrate

Extreme Thermophiles

Extreme Halophiles

Methanogens Survive in Anaerobic Conditions Many Use C0 2 (NOT O 2 ) as an Electron Acceptor in Respiration Produce Methane (CH 4 ) as a Byproduct

Three Domains of Life: Eubacteria, Archaea, Eukarya (Eubacteria, Archaea are Prokaryotic)

Prokaryotic Cells: Oldest Life in Fossil Record Billion Years Old4.6 Billion Years Old

Putative Origin of Mitochondrion and Chloroplast Cyanobacterium Purple Non-Sulphur Bacterium