domain bacteria: eubacteria domain archea: archaebacteria
TRANSCRIPT
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Domain Bacteria: Eubacteria Domain Archea: Archaebacteria
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Archaebacteria and Eubacteria Previously called Monera
Prokaryotes No Nucleus, No membrane bound
organelles
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6 Major Kingdoms:
1. Archaebacteria2. EubacteriaDomain Eukaryote
1. Protista2. Fungi3. Planta4. Animalia
1. prokaryotes2. prokaryotes
3. Unicell, and multicelled
4. Mostly Multicellular, heterotrophs
5. Muticelled, autotrophs
6. Muticelled heterotrophs
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Bacteria Kingdom Characteristics:
Archaebacteria Extremists Saline (salt)
habitats Hot sulfur
springs
Eubacteria Heterotrophs Parasites Saprobes Nitrogen
fixation Photosynthetic
autotrophs
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Penicillin Mold (Fungus)
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Penicillin Mold Kills Bacteria
First “Antibiotic” Alexander
Fleming discovered in 1928
Penicillin inhibits the growth of bacteria
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Macrophage (white blood cell) engulfs a bacterium in the
immune system
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Bacteria Structure:
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Classified by Shape, Size, Staining, Environment, & Color
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Streptococcus Bacteria
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Below: Cynobacteria and Salmonella
Autotroph Bacteria Flagellated Bacteria
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Spiral or Spirilli BacteriaExample: Syphilis-STD
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Bacilli Bacteria Tuberculosis
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Tuberculosis: Bacterial Infection
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Bacterial Reproduction:Genetic
Recombination (Sexual)
Conjugation Exchange of DNA Variety
AsexualBinary
fissionNo Variety
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Aerobic Bacteria require oxygen & can make cavities!
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Anaerobic Bacteria live without oxygen, in our intestines & may be in polluted waters
E. Coli from human feces
Helpful in the intestines
Harmful in other parts of the body
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Endospores
Thick Walled structures which keep bacteria in a Dormant state
No reproduction during this time Metabolic activity is shut down Protects bacteria against hostile
environments “Come back to life” with favorable
conditions
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Bacteria can be Helpful and Harmful
Helpful
1. Nitrogen fixation
2. Decomposition
3. Used to make Food
Harmful
1. Bacteria Cause Diseases
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Making Cheese with Bacteria
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?Life on Mars?
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This meteorite was probably blasted off of the surface of the planet Mars about 16 million years ago by an impact with an asteroid and travelled through space to the earth, where it landed on Antarctica about 13,000 years ago. Some scientists believe that the rod-shaped structures across the top and center of this image may be tiny fossilized bacteria. Many other scientists believe that the structures were formed by processes other than life.
NASA/Science Source/Photo Researchers, Inc.
"Martian Meteorite ALH84001," Microsoft® Encarta® Encyclopedia 2000. © 1993-1999 Microsoft Corporation. All rights reserved.
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Bacteria Cultures: Inoculate = to place Agar = culture
medium (nutrients) One colony
(circle)= billions of bacteria
A colony begins from one bacterium
Incubate at 37oC= body temperature
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Genetic Engineering of Insulin
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THE END