Bacteria

1
Bacteria

• Previously all classifiedKINGDOM MONERA

2
Bacteria Characteristics

• Prokaryotic
• Unicellular
• Some autotrophic
• Some heterotrophic
• Some chemotrophic
• Contain Cell Walls

3
Two Kingdoms of Bacteria

• Archeabacteria
• Most primitive organisms on earth
• Found in very harsh environments
• Eubacteria
• True Bacteria
• Disease causing bacteria in this group

4
Evolutionary Importance of Bacteria

• The oldest fossil evidence on earth is that of
  Archaebacteria
• Archaebacteria are believed to be the ancestors
  of both Eubacteria and the other eukaryotic
  kingdoms

5
The Classification of Bacteria

• Classification is based on shape and arrangement
  of individual cells

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Coccus (Cocci)

• Spherical Shaped bacteria

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Bacillus (Bacilli)

• Rod Shaped Bacteria

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Spirillum (Spirilla)

• Spiral Shaped Bacteria

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Bacterial Arrangements

• Diplo---pair of cells
• Strepto--Chain of cells
• StaphyloCluster of cells

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Draw the following bacterial shapes and
arrangements

• Diplospirillum
• Streptobacillus
• Staphylococcus

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Positive contributions of bacteria

• Decomposers
• Fix nitrogen into a useable form
• Food productionyogurt, cheese, etc.
• Sewage Treatment
• Clean Oil Spills
• Source of antibiotics

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Negative affects of Monerans

• Disease
• Syphilis, gonorrhea, tuberculosis, strep throat,
  botulism, etc.
• Food Spoilage