Sponges, Cnidarians, Flatworms, Roundworms Review Questions

1. What phyla of animals have a segmented body plan?
2. How does a complete digestive tract differ from a sac-like digestive tract.
3. List characteristics of sponges.
4. Distinguish between (or describe) a polyp and a medusa in Cnidarians.
5. Draw or describe an acoelomate, a psudocoelomate, and a coelomate animal.
6. Describe the structure of a tapeworm and name the major structures.
7. Name the three embryonic tissue layers.
8. What phyla of animals have no tissue layers? 2 embryonic tissue layers? 3 embryonic tissue layers?
9. What are the advantages of a coelom?
10. Describe the life cycle of an animal. Is it haplontic or diplontic?
11. Describe the mode of nutrition of animals (are they heterotrophs or autotrophs?)
12. Describe how a Cnidarian feeds.
13. What phyla of animals are bilaterally symmetrical in either the adult or the larval stage?
14. What phyla (or phylum) of animals are radially symmetrical?
15. What phyla of animals are pseudocoelomate? acoelomate? coelomate?
16. Draw each of the following body plans: acoelomate, pseudocoelomate, coelomate.
17. Describe the characteristics of the three classes of flatworms.
18. List the classes of flatworms.
19. Understand how the following are classified: planarians, the organism that causes schistosomaisis, tapeworms, Ascaris, Trichinella, the organism that causes elephantiasis, hookworms, and pinworms.
20. Describe how protostomes differ from deuterostomes.