Transcript Classification Ch 3

CLASSIFICATION OF
ORGANISMS
Bacteria in Biofilm
Figure 03.05b: Typical eukaryotic cell
Figure 03.05a: A stylized bacterial cell
Whittaker’s CLASSIFICATION
- consists of Five kingdoms
CARL WOESE’S CLASSIFICATION - The three domain system
Woese’s 3 Domains of
Classification
Archaea
TBL03_01: Comparison of prokaryotes and eukaryotes
THE ENDOSYMBIONT THEORY –To explain the origin of mitochondria
and chloroplasts in Eukaryotic cells
Cyanobacteria
The Cyanobacterium, Anabena,
showing heterocyst for nitrogen
fixing
Fossil of an ancient
cyanobacterium
Archaea are found in hostile
environments such as in depths
of oceans to create abundant life
there
Hydrothermal vent community
GIANT CLAMS IN
HYDROTHERMAL
DEPTHS
GIANT TUBE WORMS IN THE OCEAN DEPTHS
WHERE THE EARTH’S CRUST HAS CRACKED
Prokaryotes in hot spring in
Yellowstone National Park
Purple sulfur bacteria in sulfur
springs- sulfur granules in cells
Acid drainage from mine. Sulfur
oxidizing Archaea use metal oxides
and give off sulfuric acid
Sulfur hot springs in Yellowstone
National Park contain Archaea
Red pigmented halophiles
(Archaea) in high salt environment
Oil spill cleanup using oil-digesting
bacteria
Figure 03.MF05: Three cells of Thiomargarita namibiensis, the largest
bacterium ever found
Courtesy of Heide Schulz, Max Planck Institute of Marine Microbiology, Germany
Incredible discoveries of giant and
nanosized bacteria