EVERYDAY SCIENCE

Detailed explanation-1: -An organism that can be seen only through a microscope. Microorganisms include bacteria, protozoa, algae, and fungi. Although viruses are not considered living organisms, they are sometimes classified as microorganisms.

Detailed explanation-2: -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.

Detailed explanation-3: -Bacteria are too small to see without the aid of a microscope. While some eucaryotes, such as protozoa, algae and yeast, can be seen at magnifications of 200X-400X, most bacteria can only be seen with 1000X magnification.

Detailed explanation-4: -A microbe, or “microscopic organism, ” is a living thing that is too small to be seen with the naked eye. We need to use a microscope to see them.

Detailed explanation-5: -Pelagibacter ubique is one of the smallest known free-living bacteria, with a length of 370 to 890 nm (0.00037 to 0.00089 mm) and an average cell diameter of 120 to 200 nm (0.00012 to 0.00020 mm).