Question

what is the smallest microorganisms that can we see with naked eyes
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Answer 1

Size. Bacteria are the smallest micro-organisms, ranging from between 0.0001 mm and 0.001 mm in size. Phytoplankton and protozoa range from about 0.001 mm to about 0.25 mm. The largest phytoplankton and protozoa can be seen with the naked eye, but most can only been seen under a microscope.

Answer 2

Explanation:

Size. Bacteria are the smallest micro-organisms, ranging from between 0.0001 mm and 0.001 mm in size. Phytoplankton and protozoa range from about 0.001 mm to about 0.25 mm. The largest phytoplankton and protozoa can be seen with the naked eye, but most can only been seen under a microscope.