1. The internal shell found in squid.
2. Melanin-containing substance produced by cephalopods and used as a defensive
mechanism.
3. The twisting that allows gastropods to retract the head into the shell.
4. "Bivalvia" means this.
5. The reduced true body cavity that is found in all mollusks.
6. The internal shell found in cuttlefish used for many things.
7. Mollusk class to which slugs, snails and limpets belong.
8. Pigment cells which allow the cephalopods to rapidly change color.
9. The oldest portion of the bivalve shell.
10. "Toothed tongue" found in many mollusks and is used for scraping food.
11. The structure which secretes the shell.
12. Mollusk class which means "many plates" and contains the chitons.
13. Mollusk class to which clams, oysters and scallops belong.
14. The very well-developed structures found in cephalopods.
15. Minor mollusk class which contains the tusk shell.
16. The siphon, found in bivalves, through which water is filtered IN.
17. Mollusk class which means "one plate" and consists of mollusks with undivided arched
shells.
18. The flap that acts to cover the opening of gastropod shells during danger.
19. Funnel-like structure found in cephalopods used for jet propulsion.
20. The siphon, found in bivalves, through which waste is filtered OUT.
21. Region of the mollusk body which contains most internal organs.
22. "Gastropoda" means this.
23. Material which makes up most mollusk shells.
24. Type of circulatory system found in all mollusks EXCEPT cephalopods.
25. Tentacles are a modified version of this region of the mollusk body.
26. "Cephalopoda" means this.
27. Muscles found in bivalves which help to close the shell.
28. The shell-less class which contains wormlike mollusks.
29. Means "soft bodied."
30. Mollusk class to which squid, octopuses, cuttlefish, and the nautilus belong.
31. The external structure that distinguishes the nautilus from other cephalopods.
32. Which Phylum are Mollusca most closely related to?
33. List the seven classes of Mollusca
34. Give examples of the classes Bivalvia, Gastropoda, and Cephalopoda
35. Describe the five characteristics of Mollusca
36. Which of the molluscan classes is the largest?
37. Describe torsion in gastropods and possible advantages
38. What two ways do gastropods move?
39. Describe how gastropods eat and digest food
40. Explain the difference between open and closed circulatory systems and which one does
gastropods, bivalvia, and cephalopods have
41. Explain how gastropods procreate
42. Which is the most complex Mollusca class?
43. Describe what kind of shell cephalopoda has had in the past and what most of them
have currently.
44. How do cephalopods move?
45. Describe the cephalopods eating and digestive process
46. Describe the nervous system of the cephalopod
47. How do cephalopods procreate?
48. Which is the second largest class of Mollusca?
49. two convex halves of shells are called
50. What is the function of the adductor muscles
51. How much water can an average size oyster filter per hour
52. How do bivalvia procreate
51. What is the thin layer of tissue that enfolds the body of all mollusks
52. What type of coelom do members of Phylum Mollusca have?
53. List the three major regions of the mollusk body
54. In the open circulatory system of most mollusks, blood is found where
55. List 2 class of mollusk that have radulas.
56. A terrestrial mollusk which lacks a shell would belong to which of the following classes
57. While snorkeling on a marine expedition, students observe an active animal that has a series of muscular tentacles bearing
suckers and a large head region. Segmentation is not observed, but a pair of large, well-developed eyes is clearly evident. The
students have observed an animal belonging to which class
58. What is the rasping structure used for feeding in most mollusks
59. Cephalopods are known for their ability to rapidly change colors upon sensing danger. This is accomplished by what
60. What is the Latin for “soft bodied”
61. In shell-containing mollusks, what structure is responsible for secreting the shell
62. The shell of most mollusks is composed of what substance?
63. The _______________________________________ is the region of mollusks dorsal to the head-foot and contains the internal
organs.
64. In bivalves, what structures work with the gills in order to accomplish filter feeding?
65. What is the oldest portion of the bivalve shell?
66. The adaptations of bivalves to a sedentary, filter-feeding lifestyle that exploits the sand of a beach habitat, has led to the loss of
the _________________________ and the _______________________________.
67. In cephalopods, which funnel-like structure helps to propel the animal by rapidly expelling water
68. What is the Latin of “many plates”?
69. What is the Latin for “boat foot”?
70. What is the Latin for “one plate”?
71. What is the Latin for “without a plate”?