Mollusca questions from lecture

1. T/F Mollusca is the largest and most phylum in the animal kingdom
2. What structure allowed molluscs to be preserved in the fossil record?
3. What is an animal that belongs to class Polyplacophora?
4. What is an animal that belongs to class Gastropoda?
5. What is an animal that belongs to class Bivalvia?
6. What is an animal that belongs to class Cephalopoda?
7. What is the largest class of Molusca?
8. What type of Mollusc destroy wooden ships? How do they digest the wood?
9. What causes uneven spiral cleavage pattern?
10. What are general features of a molluscan body plan?
11. Do Molluscs have sensory organs?
12. What specialized characteristic aids in eating?
13. What are the layers of a shell?
14. What part of the shell contain s calcium carbonate?
15. What part of the shell is the shiny pearl layer?
16. What secretes the shell?
17. What are some modifications of the foot?
18. T/F The Nautilus is the only Cephalopod that has not lost its external shell?
19. What important structure is housed inside the mantle cavity?
20. T/F The mantle cavityis highly protected from the environment
21. Gills are made up of __________ (called ___________), that are highly __________ and surrounded by ____________. use the words (ciliated, filaments, blood vessles, ctenidia)
22. What class do not have a radula?
23. T/F Some individuals can harpoon prey with their radula
24. What classes of molluscs have an open circulatory system? What does this mean?
25. What is the name of the larva for Mollusca?
26. T/F Most molluscs are dioecious
27. What is a veliger?
28. What other phylum (specifically the classes) show a trochophore larva?
29. What is a nickname for Class Polyplacophora?
30. Where are Polyplacophora found?
31. T/F Polyplacophorans have a reduced foot
32. What is a common species within Gastropoda?
33. What is a common species within Bivalvia?
34. What class does nudibranch belong to?
35. What is the name of the class that Octopus belong to?
36. What is the exposed part of the mantle in Polyplacophora called?
37. T/F Polyplacophorans have an increased number of gills?
38. T/F Mollusca do not have capillaries
39. What is a Nephrostome?
40. What class has a coiled shell?
41. T/F The shell undergoes torsion and the body of the animal is coiled
42. Having a compact shell has what evolutionary advantages and what disadvantages?
43. T/F Gastropoda have a reduction of the mantle cavity and a reduction of the number of gills
44. What Gastropod extends its probiscus to engulf an entire fish
45. What part of the shell is the oldest?
46. What is the opening of the shell called?
47. T/F Right clockwise coiling is dextral
48. Slugs and Nudibranchs have lost their _________ but produce ___________ for defense.
49. T/F most marine slugs have a loss of what structure
50. T/F Some Nudibranchs are able to take Cnidocytes that have not fired their Nematocycst and utilize them for defense
51. Terrestrial slugs have an opening to the mantle cavity called a _________ that is used for gas exchange.