R What is life? A

1. Photosynthesis or Respiration: energy capture & transformation
2. Homeostasis: maintenance of favorable conditions
3. Cellsize: basic unit, building blocks
4. DNA© Tom Wood, Ph.D.: self replication
5. Reproduction
6. Evolution
7. Death !?

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Procaryotic Single-celled Organisms

Bacteria
Lactobacillus & Streptococcus tooth decay
Mycobacterium tuberculosis tuberculosis
Neisseria gonorrhoeae gonorrhea
Treponema pallidum syphilis
Yersinia pestis bubonic plague *vector / *alternate host

Other Bacterial Diseases  
Human Digestive Tract  
Antibiotic resistance  
• cocci
  
• bacilli
  
• spirilli
Eight most deadly Infectious Diseases

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Primitive Single-celled Organisms


Archaea
• Methanogens W
• Extreme Halophiles W 10 x SW
• Thermoacidophiles W 113 - 252°F
• Deep-Earth Archaea W > 3km
• None are pathogens
• Resistant to antibiotics

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Eucaryotic Single-celled Organisms

Fungi Transmission of fungal diseases
Yeast
Athlete's foot
Valley Fever BBaker
Protozoans YouTube
Cilia and Flagella
Aquatic, soil, STD trichomonas
Amoeba (amoebic dysentery) waterborne
Entamoeba histolytica life cycle
   Sporozoans (Protozoans)
Toxoplasma (catbox disease) R U Crazy
Plasmodium life cycle Malaria

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Example: epithelial cells

squamous

cuboidal

columnar

Example: stem cells /ovary

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Viruses

NO nucleus or organelles. No means of energy production or synthesis (no ribosomes or mitochondria). Cannot reproduce outside of host cell. But they CAN evolve ( SARS Flu p smallpox West Nile chikungunya(1953))

1. Simple virus: viral RNA within protein coat (Flu, fig)
2. Enveloped virus: lipid coat over protein coat (HIV)
3. Complex virus: with DNA bacteriophage >

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