What is a microbe?
Answer: A microbe is a single-celled creature that cannot be seen with the naked eye. They tend to be good and very useful; they take a part in helping us eat and breathe. Some, however, are the opposite making organisms quite sick. One thing that is cool about microbes is that they are known to be the first organisms on earth. There are four major kinds of microbes: bacteria, viruses, fungi, and protozoa.
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