Download Homework Questions Chapter 6, Part 2, Higher Invertebrates

Molluscs
1. Snails, clams, octopuses, and other familiar forms are members of the phylum _________.
2. Molluscs have a soft body, often protected by a shell made out of _____________.
3. The thin layer of tissue that secretes the shell is called the _______________.
4. True or false? Mollusks typically show radial symmetry?
5. Molluscs are unique in that they have a _________, or small ribbon of teeth made of chitin.
6. What is the largest, most common, group of molluscs?
a. bivalves b. gastropods c. cephalopods d. they are all equal
7. Give three examples (common names) of gastropods.
8. What class are abalone in?
9. What does gastropod mean?
10. The California Mussel is in the class __________________.
11. True or False? Bivalves perform respiration through the use of gills.
12. What do clams use their foot for?
13. Mussels secrete _________ ___________ that attaches them to rocks and each other.
14. What class are cuttlefishes in?
15. What is an example of a cephalopod?
a. Oysters b. Mud snails c. Octopuses
d. Sea slugs
16. Cephalopod means _______ footed.
Arthropods
17. What phylum makes up the largest group of animals on Planet Earth with more than a million known species
and many still undiscovered?
a. arthropods b. mollusks c. echinoderms d. sipunculids
18. What phylum contains jointed-foot animals?
19. Do arthropods have an exoskeleton or endoskeleton?
20. To grow arthropods must periodically__________.
21. The overwhelming majority of marine arthropods are in the subphylum __________________.
22. Give two examples (common names) of crustaceans.
23. Crustaceans are arthropods adapted to live in water. They have_______ for respiration, calcified exoskeleton
made of _____________, and two pairs of _______ to sense their environment.
24. Why are copepods considered to be extremely important?
25. _________ are filter feeders that usually live attached to surfaces (like whales and crabs).
26. What is the order containing small crustaceans with laterally compressed bodies?
27. What is the difference between amphipods and isopods?
Echinoderms
28. What phylum do sea stars belong to?
29. Most echinoderms have ________________ radial symmetry.
30. What kind of skeleton do echinoderms possess?
31. What is the network of water-filled canals?
32. There are about 7000 known species of echinoderms, all of which are _________.
33. Give 5 examples of echinoderms, one from each class
34. Sea stars extend part of their ________ inside out through the mouth to envelop food
35. On the oral surface of a sea star there are ___________ ____________ used for
locomotion, and ______________ _______________, or radiating channels.
36. What organ does the “yard work” on the aboral surface of a sea star?
37. What do sea stars like to eat?
38. The jaw system of a sea urchin is called _________________ __________.
39. What kind of a feeder is a sand dollar?
40. How do sea cucumbers defend themselves?
41. Echinoderms lack a distinct ______________ system.