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Study Questions:
1. Name three different types of annelids.
2. What distinguishing type of larva do annelids and molluscs have?
3. What is the benefit of a one-way digestive tract?
4. What are the four groups of molluscs?
5. What is torsion and what groups of molluscs demonstrate it?
6. Show how the cephalopod body plan evolved from the ancestral molluscan body plan.
7. What is the relationship between octopus loosing their 'endoskeleton' and their ecology?
8. What distinguished the ecdysozoans?
9. Name three human nematode parasites.
10. Name the five subphyla of Arthropods.
11. Use one of these groups to dedscribe the patterns of duplication, specialization, and fusion.
12. Why are there so many species of insects?
13. What characterizes the deuterostomes?
14. Name three Echinoderms.
15. Name the three subphyla of the Chordata.
16. List the four characteristics that all chordates express at some time in their development.