1. Mollusk Review Game

2. Which of the following is not a characteristic of a bivalve?
a. Valves are hinged on the dorsal side c. burrowing
b. laterally compressed d. have a radula

3. A

4. The largest class of molluscs as far as the number of species it contains is?
a. Bivalvia c. Gastropoda
b. Cephalopoda d. Scaphopoda

5. C

6. The mantle of a mollusk is used for all of the following except?
a. locomotion d. sensory reception
b. respiration e. All are characteristics
c. waste disposal

7. E

8. How many tentacles and arms does a squid have?
b. 8:2 d. 2:10

9. C

10. Which of the following is not a characteristic of a octopus?
a. lack an internal shell c. feed mainly at night
b. live alone and are territorial d. none of the above

11. D

12. Which of the following has the most complex brain of all the invertebrates
a. Squid c. Snail
b. Octopus d. Clam

13. B

14. The Chambered Nautilus has remained unchanged for over?
a. 400 years c. 400,000,000 years
b. 400,000 years d. 400,000,000,000 years

15. C

16. Gastropod means...
a. gas footed c. head footed
b. stomach footed d. siphon footed

17. B

18. Cephalopod means...
a. gas footed c. head footed
b. stomach footed d. siphon footed

19. C

20. Only Cephalopod that has a shell?
a. chambered nautilus c. squid
b. cuttlefish d. octopus

21. A

22. What structure in the mollusk secretes the shell?
a. gills c. abductor muscles
b. foot d. mantle

23. D

24. What is the only mollusk class that has a terrestrial form?
a. Polyplacophora d. Monoplacophora
b. Gastropoda e. Cephalopoda
c. Bivalvia f. Scaphopoda

25. B

26. What is the radula composed of?
a. chitin c. calcium carbonate
b. calcium chloride d. sodium bicarbonate

27. A

28. What are the shells of bivalves composed of?
a. chitin c. calcium carbonate
b. calcium chloride d. sodium bicarbonate

29. C

30. The digestive system of the cephalopod goes from the mouth to the _________________, to the _________________, to the ___________________

31. Esophagus, Stomach, Caecum

32. Cephalopods have a _____________ that help them cut into prey as their tentacles force the prey forward.

33. Horny beak and the radula

34. ________________________ are the cells that allow Cephalopods to change color

35. Chromatophores

36. The internal bone of the cuttlefish is called the _____________________

37. Cuttlebone

38. Nudibranchs have two sensitive tentacles located at the top of their heads called ___________________________

39. Rhinophores

40. a. Chitons e. Nudibranchs
b. Mollusks without shells f. Mussels
c. Mollusks with 1 shell g. Chambered Nautilus
d. Tusk shells
1. Aplacophora

41. B

42. a. Chitons e. Nudibranchs
b. Mollusks without shells f. Mussels
c. Mollusks with 1 shell g. Chambered Nautilus
d. Tusk shells
2. Bivalvia

43. F

44. a. Chitons e. Nudibranchs
b. Mollusks without shells f. Mussels
c. Mollusks with 1 shell g. Chambered Nautilus
d. Tusk shells
3. Cephalopoda

45. G

46. a. Chitons e. Nudibranchs
b. Mollusks without shells f. Mussels
c. Mollusks with 1 shell g. Chambered Nautilus
d. Tusk shells
4. Gastropoda

47. E

48. a. Chitons e. Nudibranchs
b. Mollusks without shells f. Mussels
c. Mollusks with 1 shell g. Chambered Nautilus
d. Tusk shells
5. Monoplacophora

49. C

50. a. Chitons e. Nudibranchs
b. Mollusks without shells f. Mussels
c. Mollusks with 1 shell g. Chambered Nautilus
d. Tusk shells
6. Polyplacophora

51. A

52. a. Chitons e. Nudibranchs
b. Mollusks without shells f. Mussels
c. Mollusks with 1 shell g. Chambered Nautilus
d. Tusk shells
7. Schaphopoda

53. D

54. Explain how an open circulatory system works.

55. As noted in the picture, in an open circulatory system the blood vessels are not fully connected blood flows from the heart to various openings (sinuses) located in the body where nutrients are exchanged then pulled back into vessels

56. Name the 3 body regions the mollusc is divided into.

57. Head, Foot, Visceral Mass

58. Explain how predatory snails feed.

59. Predatory snails use a radula to drill a hole through the shell of their victim and then they insert their proboscus with the radula at the tip and proceed to scrap the internal tissues from the victim

60. How is a Cone Snail different in its predatory skills?

61. Cone Snails use their modified radula dart to harpoon their prey and insert a neurotoxin that immobilizes the prey

62. What is jet propulsion?
Is jet propulsion an efficent mode of locomotion?
List 3 examples of organisms that use jet propulsion.

63. Jet Propulsion is when the cephalopod uses the process of pumping water through a siphon to propel them through the ocean. No Squids, Octopuses, Cuttlefishes, and Chambered Nautiluses

64. How can the largest of the Cephalopods accommodate for jet propulsion?

65. The largest of Cephalopods will use the fin like structure of their mantle to help move them through the water.

66. How are Nudibranchs different from other Gastropods?

67. Nudibranchs lack a protective shell that many other gastropods have.

68. The ability to change colors allows many Cephalopods to do many things, name some of those things that they are able to do.

69. The ability to change colors allows cephalopods to communicate with other individuals, allows them to camouflage with their environment, allows them to hypnotize their prey, etc.

70. Explain the function of the chambers in the chambered nautilus.

71. The chambers inside the shell of the chambered nautilus allow for buoyancy. The nautilus can regulate its density by injecting or removing fluid into/out of these chambers through a system of tubes.

72. Some of the male cuttlefish have an interesting trick to successfully mate with the female cuttlefish. What is this interesting trick and why is it so successful?

73. Some smaller males ‘cross-dress’ to look like females by pulling in their tentacles. This tactic is successful because the bigger males will let the cross-dressing male to pass by unchallenged. The cross-dressing male can then mate successfully with the female cuttlefish.

74. Explain the function of the adductor muscles for the bivalves

75. The adductor muscles in a bivalve allows them to open and close their shells quickly

76. What is the primary mode of locomotion for the clam
What is the primary mode of locomotion for the clam? And explain how this mode of locomotion works.

77. The primary mode of locomotion for the clam is its foot
The primary mode of locomotion for the clam is its foot. The clam pushes the foot into a substrate. The foot then fills with blood causing it to expand and grip the substrate. Then the clam pulls the body toward the foot.

78. Explain why it is so important that the squid must cut down food into tiny bits.

79. The squid’s brain is shaped like a donut with the esophagus running through the middle of it. If the squid eats something that is too large the esophagus could stretch out put pressure on the brain and cause brain damage to the squid.

80. What happens to the cuttlefish after they mate?

81. They die

82. What is unique about the cuttlefish’s eyes and why is that beneficial?

83. The cuttlefish’s eyes are shaped like a ‘w’ which allows for better peripheral vision.