A very small organism that can only be seen with a microscope, like bacteria, is a microorganism. A microorganism is a tiny living thing that can be found everywhere, and it includes bacteria, viruses, and fungi.
Microorganism: A very small organism that can only be seen with a microscope, like bacteria, is a microorganism. A microorganism is a tiny living thing that can be found everywhere, and it includes bacteria, viruses, and fungi.
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