Critical Thinking Activities - Chapter 33

Question 1. The integument of flukes and roundworms allows them to live intimately inside our bloodstream and ducts without being rejected by our immune system, or easily affected by drugs. If customs are not easily changed, how can a scientist break the chain of transmission?

Question 2: Both sponges and sea anemones are sessile. What is the difference, if any, in being inside the central cavity of these two organisms?

Answers are available to instructors in the Instructor's Manual.
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