1. What is the importance of the three phyla of Acoelomate Animals in terms of developing a new body plan? How does this new body plan relate to more advanced animals? 1 point.

2. How do members of the phylum Platyhelminthes obtain their oxygen? How do members of this phylum "support" themselves? How are nutrients distributed? 1 point.

3. Animals of the Class Monogenea find habitats in the gills of fish, the urinary bladders of frogs and turtles, and the eyes of hippos. Obviously, these are not habitats that we would seek to inhabit. Speculate as to why monogeneans have exploited those habitats. 1 point.

4. How do flukes attach to their hosts? 1 point.

5. Where in the life cycle (LC) of the human liver fluke could the cycle be broken? What steps would you propose to do this? What problems would you most likely encounter? Why is this LC so complex? What disadvantages does this LC cause for this parasite? How has this parasite overcome potential disadvantages? 5 points.

6. What is the major difference in the life cycle of the blood fluke and the liver fluke? How can blood fluke infections be prevented? Where geographically are these infections found? Where in the human body? Explain how blood flukes reproduce and compare this to the reproduction of human liver flukes. 4 points.

7. In the life cycle of the beef tapeworm, which organism is the intermediate host? The final host? Describe two ways in which beef tapeworms can be prevented. Ho do cestodes obtain nutrition? 2 points.

8. Why is the dog tapeworm dangerous to humans? 1 point.

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