Invertebrate Zoology Bio 33404
Study Guide Exam 2
1. Be able to define the following terms:
- bilateral symmetry
- anterior
- posterior
- dorsal
- ventral
- parthenogenesis
- hermaphrodite
- ectoparasite
- endoparasite
- definitive host
- intermediate host
- extant
- cloaca
- hemocoel
- protonepridia
- radula
- introvert
- trochophore
2. Distinguish between an acoelomate, a pseudocoelomate and a coelomate.
3. Describe the basic pattern of development including zygote, cleavage, bastula, blastocoel, blastopore, endoderm, ectoderm, mesoderm.
4. Be able to distinguish between a protostome and a deuterostome including differences in cleavage (spiral vs radial), fate of blastopore (mouth vs anus) and coelom development (schizocoely vs enterocoely).
5. What are the major characteristics of worms in the Phylum Platyhelminthes?
6. The phylum Platyhelmintes contains 4 classes: Turbellaria, Trematoda, and Cestoda and Monogenea. Differentiate between the 4 groups and give some examples of each.
7. Draw and explain the life cycles of the following worms in the Phylum Platyhelminthes:
- sheep liver fluke - Fasciola
- Chinese liver fluke – Clonorchis
- Blood fluke – Shistosoma
- Tape worm - Taenia
8. What are the similarities and differences between Nemerteans and Platyhelminthes?
9. What minor phyla are acoelomates like Nemerteans and Platyhelminthes?
10. What are the major characteristics of the Phylum Nematoda?
11. Be able to draw and explain the life cycles of the following nematode parasites:
- Hookworms (Ancyclostoma)
- pinworms (Enterobius)
- Ascaris
- Trichina
- Guinea worms
12. What are the major characteristics of the Phylum Rotifera?
13. Compare the life cycles of a monogont and bdelloid rotifers.
14. What other minor phyla are pseudocoelomates like nematodes and rotifers?
15. Describe/draw the molluscan features of visceral mass, muscular foot, mantle and mantle cavity
16. List the 7 classes of Mollusca and describe how to tell them apart.
17. Distinguish between the gastropod classes prosobranchia and heterobranchia, and the subclasses opisthobranchia and pulmonata.
18. Distinguish between the bivalve groups lamellibranches, protobranchs and septibranches.
19. What major advances do cephalopods have over other mollusks?
20. Distinguish between the cephalopod groups ammonites, nautiloids, coleoids, decapods and octopods.
21. Distinguish between open and closed circulatory systems.
22. Be able to give the major similarities and differences between the major phyla Platyhelminthes, Nematoda, and Mollusca. You might try making a table such as below:
| Phylum | Platyhelminthes | Nematodes | Molluscs |
| Cavity | acoelomate | pseudocoel | coelomate |
| Circulatory system | none | none | open |
23. Be able to identify slides, photographs and preserved animals that were seen in lab in terms of name of organism (common name and genus name where appropriate), external structure, internal structures where appropriate and the phylum or class to which it belongs.
Last Updated August 23, 2006