Humans Can See Objects as Small as 0

question 23

Multiple Choice

Humans can see objects as small as 0.1 mm. Leeuwenhoek's best microscope could magnify objects to 300X. Which of the following would be invisible using Leeuwenhoek's microscope?

• A) Poliovirus, 30 nm
• B) Escherichia coli, 1 μm X 4 μm
• C) Pandora virus, 0.5 mm X 1 mm
• D) Red blood cell, 8 μm

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