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-Good for the envorment -Bad for people

Nitrogen-Fixing Bacteria

-Consume nitrogen form air and change its form so plants can use it
-Nitrogen is an essential chemical for all organisims because it contains proteins and DNA
-Plants need nitrogen in order to grow properly

Decomposing Bacteria

-Break down dead organic matter to make nutrients avalibe to living things


-Bacteria and other microorganisims used to change pollutants into harmless chemicals


-Medicines that kill or slow the growth of bacteria and other microorganisims


-A substance produced by the body to properly ise sugars and other carbohydrates

Pathogenic Bacteria

-Bacteria that invade a host organism and obtain the nutrients they need from the hosts cell
-Can damage or destroy the cell

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