Invertebrate Animal Diversity – Fall 2004 Study Guide for 2 nd Midterm How do protostomes and deuterostomes differ in their development with respect to cleavage, blastopore development, tissue layer organization, and cell fate? How are tissue layers arranged in coelomates, acoelomates, and pseudocoelomates? How do coelomic spaces aid in digestion and locomotion? How do antagonistic muscles control movement in hydrostatic skeletons? What are some adaptations seen in meiofauna and how do they relate to their ecology? What is cryptobiosis? How do Rotifers reproduce? Other unique methods of reproduction? Discuss the relationships of the Lophophorates & Trochozoans. What are some advantages of metamerism? What are some examples of different waste removal systems? How about different methods of aquiring food? How do Annelid body plans relate to their habitat and locomotion? How do errant Polychaetes move? Discuss some feeding strategies of Annelids and Annelid allies. How do leeches differ from other Annelids with respect to body morphology, locomotion, feeding, and reproduction? How do Sipulculids, Echiurans, and Pogonophorans feed and obtain energy? Compare and contrast body morphologies among the worm-like trochozoans. What is the HAM (hyp. anc. mollusc) and how does it compare to body morphologies seen in different Molluscan classes? What is ecotoxicology and how can invertebrates be used to assess environmental health? What are some criteria that make invertebrates good biomonitors and bioindicators?
What are some similarities and differences between the free-living Platyhelminthe and Nemertean worms? Do you think they are closely or distantly related and why? What characteristics point to a close relationship between these two groups? To a distant relationship?