Life Science

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Life Science

• Bacteria The Good, The Bad and The Ugly

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Brief Review
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Bacterial Shapes COCCI
Streptococcus(strep throat)Staphylococci
(responsible for "staph" infections and gangrene)
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Bacterial Shape BACILLUS
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Bacterial Shape SPIRILLA
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THE GOODNot all bacteria are harmful.

• Bacteria as decomposers

Underside of a leaf enlarged 5000x
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Nitrogen Fixing Bacteria

• Some bacteria have the ability to absorb nitrogen
  and change it into a form usable by plants
• We eat the plants or the animals that ate the
  plants and we get that nitrogen
• Plants such as clover, peas, beans -legumes

alfalfa
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Fermentation- the breakdown of some nutrient
molecule(usually sugar) into alcohol or some
other food molecule such as

• Wine and cider are turned into vinegar
• Sauerkraut from cabbage
• Pickles from cucumber
• Silage from corn
• Linen from flax
• Dairy products-yogurt, cheese,
• Cottage cheese from sour milk
• Holes in Swiss cheese from gases generated by
  bacteria

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THE BADPathogenic bacteria-disease causing

• Food poisoning-botulism
• Halitosis
• Tooth decay
• anthrax

www.dmacc.cc.ia.us/instructors/scottie.htm
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The UGLYWhat bacteria can do.
Corn blight
Tooth decay
Rash of lyme disease
anthrax
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Your AssignmentResearch AND powerpoint
presentation

• Choose one GOOD and one BAD bacteria
• GOOD
• how product is made and how bacteria are involved
• BAD
• what disease How is infection spread
• Symptoms picture /scientific name
• Treatment where bacteria is found