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Prokaryotic Domains
Cells without nuclei
23 April 2014 1Prokaryotic-lab.ppt
Prokaryotic Domains
• Cells lack (never evolved) nuclei
• Mostly small– Eukaryotic cells 7-20 m
– Prokaryotic cells 0.5-10 m
23 April 2014 2Prokaryotic-lab.ppt
Prokaryotic Diversity
23 April 2014 3Prokaryotic-lab.ppt
• Cell shapes– Sphere = coccus– Rod = bacillus– Spiral = spirillum
Prokaryotic Diversity
• Cell walls– Gram positive
• Thick cell wall stains purple
– Gram negative• Thin cell wall does
not stain purple
23 April 2014 4Prokaryotic-lab.ppt
Photosynthetic Bacteria
• Cyanobacteria (blue-green algae)– Anabaena
– Oscillatoria
– Gleocapsa
23 April 2014 5Prokaryotic-lab.ppt
Diversity of Prokaryotes
• Shapes
• Gram positive or negative
• Heterotrophic or photosynthetic
• then ???
23 April 2014 6Prokaryotic-lab.ppt
Diversity of Prokaryotes
• Respiration in Eukaryotes– Glucose + O2 CO2 + H2O + energy
– Glucose + [No O2] lactic acid + energy
– Glucose + [No O2] ethyl alcohol + CO2 + energy
23 April 2014 7Prokaryotic-lab.ppt
Diversity of Prokaryotes
• Respiration in Prokaryotes– Glucose + O2 CO2 + H2O + energy
– Glucose + [No O2] lactic acid + energy
– Glucose + [No O2] ethyl alcohol + CO2 + energy
23 April 2014 8Prokaryotic-lab.ppt
Diversity of Prokaryotes
• Respiration in Prokaryotes– [carbon source] + H2S + O2 CO2 + S2 (or
H2SO4) + energy
– [carbon source] + N2 NH3 + energy
– [carbon source] + NH3 + O2 CO2 + HNO2 + energy
– [carbon source] + Fe+2 + H2O + O2 CO2 + Fe+3 (rust) + OH- + energy
– And more !!!!23 April 2014 9Prokaryotic-lab.ppt
Photosynthetic Bacteria
• Cyanobacteria (blue-green algae)– Anabaena (#29)
– Oscillatoria
– Gleocapsa
23 April 2014 10Prokaryotic-lab.ppt
Prokaryotic Diversity
23 April 2014 11Prokaryotic-lab.ppt
• Cell shapes (#30)
– Sphere = coccus– Rod = bacillus– Spiral = spirillum
Review for Lab Final• All labs after midterm (Spring Break)
Phyla & Classes of invertebrate animals • Lancelet
• Clam dissection
• Earthworm, nematodes, flatworms
• tapeworm
• Cnidaria, living & on slides
Kingdom Fungi, PhylaProtista, living and on slidesProkaryotes (today)
23 April 2014 Prokaryotic-lab.ppt 12