Name - Size (Diameter)
• Polio virus - 20 nm (20x10-9m)
• Smallpox Virus - 200nm
• Escherichia coli (bacterium) - 0•8um (0•8 x 10-6m)
• Yeast (fungus) - 1um
• Paramecium (protozoan) - 200um
• Amoeba (protozoan) - 1mm
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