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In the Lab Library
In a chemistry book, you learn that metal salts such as
sodium cyanide each give off a distinctive color when burned. A chart
helps you conclude that both sample A and sample B contained equal amounts
of these salts.
In a microbiology text, you see that fungi are, typically,
larger than 10 microns. Bacteria are one-celled creatures typically
larger than a half micron, but smaller than 10 microns. Viruses are
always much smaller than a half micron. Chemicals are also much smaller
than a half micron.
Bacteria, and to a lesser extent, fungi, are among the
organisms that culture well in petri dishes.
Continue analyzing the test
results 
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