Welcome to Bacteria!

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Welcome to Bacteria!
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Interdependence
Bacteria and other organisms rely on their
environmentand other species for survival.
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Bacteria
Organisms that are made of prokaryotic cells
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Prokaryotic Cells

• Have no nucleus
• Do not have membrane bound organelles
• Have circular pieces of DNA known as a plasmids
• Are very smallunicellular
• Often have a flagellum for movement

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What kingdom?

• Bacteria are placed into one of these kingdoms
• Archaebacteria-ancient bacteria
• Eubacteria-true bacteria

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Archaebacteria

• Live in very extreme conditions (no oxygen, no
  sun, very high heat, salty regions.
• In most conditions, are usually heterotrophic

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Eubacteria

• Bacteria found under normal conditions
• Heterotrophic---parasitic (feed on plants, meats,
  milk, etc.)
• Autotrophic---photosynthesize.

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Shapes of bacteria

• Bacteria are classified according to their shape
  
• Round is called coccus
• Rod shaped is called bacillus
• Spiral shaped is called spirillus

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Where do they live?

• Bacteria are found in all environments

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Reproduction

• Binary Fissionform of asexual reproduction.
• Conjugationtransfer of genetic information
  (sexual???)

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Role of bacteria

• Some bacteria are helpful to our environment
• Some bacteria are harmful to humans and other
  living things

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Helpful bacteria

• Decomposers break down dead organic material
• Biotechnology - inserting helpful genes into a
  plasmid
• Bioremediation - bacteria eat up oil spills
• Food production cheese and yogurt
• Put nitrogen back into the soil
• Aid in digestion

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Harmful bacteria

• Bacteria that cause diseases are called
  pathogens.
• Some diseases caused by bacteria are
  tuberculosis anthrax tetanus e. coli