1. The Diversity of Life I. An Overview II. An Overview of 'The Bacteria' III. Domain Archaea and The Early Earth

2. The Diversity of Life I. An Overview II. An Overview of 'The Bacteria' III. Domain Archaea and The Early Earth The three Archaean groups exploit extreme environments (like early Earth?):

3. The Diversity of Life I. An Overview II. An Overview of 'The Bacteria' III. Domain Archaea and The Early Earth The two Archaean groups exploit extreme environments (like early Earth?): Crenarchaeota: 'thermacidophiles' - reduce sulphur compounds in geothermal sulphur springs and geothermal vents.

4. The Diversity of Life I. An Overview II. An Overview of 'The Bacteria' III. Domain Archaea and The Early Earth The two Archaean groups exploit extreme environments (like early Earth?): Crenarchaeota: 'thermacidophiles' - reduce sulphur compounds in geothermal sulphur springs and geothermal vents. Euryarchaeota: 'methanogens' - reduce CO2 and harvest small amounts of energy.

5. The Diversity of Life I. An Overview II. An Overview of 'The Bacteria' III. Domain Archaea and The Early Earth The two Archaean groups exploit extreme environments (like early Earth?): Crenarchaeota: 'thermacidophiles' - oxidize sulphur compounds in geothermal sulphur springs and geothermal vents. Euryarchaeota: 'methanogens' - reduce CO2 and harvest small amounts of energy. 'halophiles' - live in saline environments; some have a very primitive form of photosynthesis.

6. The Diversity of Life IV. Domain Eubacteria - Proteobacteria: a diverse group including photosynthetic sulphur bacteria (using H2S as an electron donor in photosynthetic pathways), mitochondria relatives, and some human pathogens (Salmonella, Vibrio cholerae)

7. The Diversity of Life IV. Domain Eubacteria - Proteobacteria: a diverse group including photosynthetic sulphur bacteria (using H2S as an electron donor in photosynthetic pathways), mitochondria relatives, and some human pathogens (Salmonella, Vibrio cholerae) - Cyanobacteria: probably the first oxygenic photosynthetic organisms, they are similar structurally and physiologically to chloroplasts in eukaryotes.

8. The Diversity of Life IV. Domain Eubacteria - Proteobacteria: a diverse group including photosynthetic sulphur bacteria (using H2S as an electron donor in photosynthetic pathways), mitochondria relatives, and some human pathogens (Salmonella, Vibrio cholerae) - Cyanobacteria: probably the first oxygenic photosynthetic organisms, they are similar structurally and physiologically to chloroplasts in eukaryotes. - Spirochaetes: motile and often parasitic pathogens (syphilis, Lyme disease)

9. The Diversity of Life IV. Domain Eubacteria - Proteobacteria: a diverse group including photosynthetic sulphur bacteria (using H2S as an electron donor in photosynthetic pathways), mitochondria relatives, and some human pathogens (Salmonella, Vibrio cholerae) - Cyanobacteria: probably the first oxygenic photosynthetic organisms, they are similar structurally and physiologically to chloroplasts in eukaryotes. - Spirochaetes: motile and often parasitic pathogens (syphilis, Lyme disease) - Chlamydias: exclusively parasitic - Firmicules: spore-forming pathogens - Staph, TB, tetanus

10. The Diversity of Life I. An Overview II. Introduction to the 'Bacteria' IIV. Domain Archaea and The Early Earth IV. Domain Eubacteria IV. Domain Eukarya

11. The Diversity of Life IV. Domain Eukarya A. Characteristics - membrane bound nucleus - organelles - sexual reproduction

12. The Diversity of Life IV. Domain Eukarya B. Origins infolding of membrane

13. The Diversity of Life IV. Domain Eukarya B. Origins endosymbiosis - mitochondria and chloroplasts (Margulis - 1970's)

14. The Diversity of Life IV. Domain Eukarya C. Phylogeny

15. The Diversity of Life IV. Domain Eukarya D. Diversity

16. The Diversity of Life IV. Domain Eukarya D. Diversity

17. The Diversity of Life IV. Domain Eukarya D. Diversity Foraminifera

18. The Diversity of Life IV. Domain Eukarya D. Diversity

19. The Diversity of Life IV. Domain Eukarya D. Diversity

21. The Diversity of Life IV. Domain Eukarya D. Diversity - green alga Same chlorophyll as plants alternation of generation genetic analysis confirms relatedness

23. The Diversity of Life IV. Domain Eukarya D. Diversity - Choanoflagellates