Good and Bad Bacteria

A video from TVschoolhouse.com.  This is a great website!
Click to watch a 10-minute video about good and bad bacteria.  This is a good review of Module 2.
In the video, he talks about 3 kinds of bacteria - parasites, saprophytes, and autotrophs.
Why doesn't he mention heterotrophs?
Because parasites and saprophytes are the two kinds of heterotrophs - bacteria which do not make their own food.
What is mentioned that is made from bacteria that can save lives? 
Also learn about how bacteria take in food thru their cell walls.
Keep watching!  =)

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