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A. "10,000 nanometers wide, which is the smallest dimension we can see with the naked eye" (http://www.discovernano.northwestern.edu/whatis/index_html/howsmall_html)
- Thiomargarita:
"Discovered in 1999, it is the largest bacterium ever discovered, with a width up to 750 ?m (0.75 mm) , making it easily visible to the naked eye." (http://en.wikipedia.org/wiki/Thiomargarita_namibiensis)
- Yeast:
"Yeast size can vary greatly depending on the species, typically measuring 3–4 µm in diameter, although some yeasts can reach over 40 µm." (http://en.wikipedia.org/wiki/Yeast)
B.
- Cholera:
some dude found it with his microscope, in an age before electron microscopes (http://www.ph.ucla.edu/EPI/snow/firstdiscoveredcholera.html)
C. "Believe it or not, waves of light are too large – visible light has a wavelength between 400 and 750 nanometers. That’s much larger than many nanoscale objects and definitely larger than most molecules. Instead the specialized microscopes use very small probes or electrons."
(http://www.discovernano.northwestern.edu/whatis/index_html/instruments_html)
- water molecule:
less than 100 pm (http://en.wikipedia.org/wiki/Water_(molecule))
- Filovirus:
"80nm" (http://en.wikipedia.org/wiki/Filovirus)
- Retrovirus
- Cold Virus
- E. coli:
"It is about 2 nanometers long and 1 nanometer wide. It is shaped like an oval." (http://redpoll.pharmacy.ualberta.ca/CCDB/cgi-bin/STAT_NEW.cgi)
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