Q.

The smallest size of a cell that can be seen with naked eye is:

A. 1 micron
B. 10 micron
C. 100 micron
D. 1000 micron
Answer» C. 100 micron
Explanation: The smallest objects that can be seen with unaided eye are about 0.1 mm long, which is equal to 100 micrometres. Micron (u) is an alternate name of micrometre.
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