1. Briefly define and indicate function for the following terms



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Molluscs
1. Briefly define and indicate function for the following terms.

Foot


Mantle

Radula


Shell
2. a. What type of circulation is found in most molluscs. b. What is unusual about the circulatory system of cephalopods? c, What types of eyes are found among molluscs? d. Compare the camera eye found in cephalopods to that found in vertebrates.
3. Briefly describe these larval forms. a. Trochophore b. Veliger and C. Glochidia.
4. Mollusc fossils are known from the ___________________. b. Which group most resembles the most primitive type of mollusc and why? c. What primitive characterisatics are exhibited by monoplacophorans and polyplacophorans.
5. What are aesthetes? What body structures have or lack found in typical molluscs?
6. How is locomotion in snails aided by slilme?
7. a. What determines the direction of coiling in snail shells? Describe torsion. Is their evidence of detorsion in nudibranchs?
8. Compare the mating ritual of marine snails to that of marine free living Platyhelminthes.
9. Briefly describe the important roles played by gastropods in ecosystems.
10. Briefly describe filter feeding in bivalves. b. What roles are played by body components such as gills and palps? c. Comment on the economic importance of bivalves.
11. How does the shell of Nautiloids function in locomotion?
12. Compare the anatomy of a squid to that of a snail and bivalve. How do squids move by jet propulsion?
13. How do octopi use their chromatophores in camouflage?
14. a. Describe mating in cuttlefish or squid. Describe evidence that indicates that cephalopods, especially octopi are intelligent and can learn.


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