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In this activity on page 3 of the PDF, learners visualize the relative size and structural differences between microbes that have the potential to cause disease.

By playing a card game similar to "Go Fish," but based on the stages of metamorphosis, learners will be able to see how insects change in form as they grow and will consider the advantages of undergoi

This lesson introduces learners to the world of nematodes (roundworms).

This activity (on pages 19-25) is about fleas and ticks, which are common pet parasites.