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

An Access Excellence Science Mystery sponsored by Genentech, Inc.