while often overlooked unless trying prevent sickness or dealing sickness bacteria are every

At least a 300 word essay

 

While often overlooked, unless trying to prevent sickness or dealing with sickness, bacteria are EVERYWHERE.  They are often given a bad rap but they are necessary for our survival. Give 3 examples of  bacteria that we humans need to survive and how they help us.  Also, note what type of symbiotic relationship is illustrated with each example.