Bacteria in the World Around Us Bacteria and Us!! Bacteria in the World Around Us

Good for the Environment Most bacteria are harmless/helpful to humans Bacteria are involved in Nitrogen Fixation Environmental recycling Environmental Cleanup

The Role of Bacteria in Nature Environmental Recycling Heterotrophic Decomposers Organisms that break down large chemicals in dead organisms into small chemicals “Natures Recyclers” Bacteria break down leaves on ground Nitrogen Fixing Bacteria Live in soil and swellings on the roots of plants Convert nitrogenous gas from air into nitrogen products plants need Called Nitrogen Fixation

The Role of Bacteria in Nature Environmental Clean-up Bioremediation Convert poisonous chemicals in oil into harmless substances Oil eating bacteria Used in oil spills and gas leaks Chemical spills farmers

Good for People Food Production Bacteria help make Cheese Sauerkraut Yogurt Pickles!!!!!! Breaks down lactose into lactic acid Makes food taste better!!! Milk and other foods goes through pasteurization- Food is heated up to temperature that is high enough to kill harmful bacteria without changing the taste of that food Named after Louis Pasteur

Good for People Makes medicine Insulin Genetic Engineering Antibiotics 1970’s genes were put in bacteria Makes insulin and then given to diabetics Genetic Engineering Changing genes Insecticides Cleansers Adhesives

Good in your Body Bacteria in your digestive system Digest food Make vitamins Compete with disease causing organisms preventing harmful bacteria

Harmful Bacteria Humans Plants Pathogenic bacteria Cause disease Get in host and take nutrients Protected by vaccinations Antibiotics Plants Damage to grain crops Damage to trees

Bacteria How can you kill bacteria? What are the three shapes of bacteria? What is one way bacteria helps us?