Six lessons cover this chapter. Open any of them on its own below, or meet it in place inside chapter 1 of the book. Tick a lesson off once you can predict what it will do before you touch it.
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2
Where Your Microbes Live
Pick a body site. Then watch soap or a drug change who lives there.
3
Colonization, Infection, Disease
Set the dose and the defenses. Run the days and see which state you get.
4
Koch's Postulates
Run the four steps on three real cases. See where the proof holds up.
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Place It on the Tree of Life
Read a cell's features, then place it in one of the three domains.
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