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- 1. Multiple ChoiceMollusks are acoelomates.TrueFalse
- 2. Multiple ChoiceMollusks can be aquatic or terrestrial.TrueFalse
- 3. Multiple ChoiceWhich of these is NOT one of the three main body parts of a mollusk?HeadValveFootVisceral Mass
- 4. Multiple ChoiceWhat is the radula used for?LocomotionFeedingSwimmingDigging
- 5. Multiple ChoiceThe protective membrane that surrounds the visceral mass on all mollusks is called...RadulaMantleNephridiaVisceral Shield
- 6. Multiple ChoiceThe protective shell of a mollusk...is secreted by the mantle.Grows from the end of the mollusk foot.Is constantly replaced by bigger shells as the mollusk grows.forms when the mollusk reaches adulthood.
- 7. Multiple ChoiceAll mollusks have an external shell.TrueFalse
- 8. Multiple ChoiceWhich of the following is NOT a reason that some mollusks move slowly?They have a heavy shell.They have a closed circulatory system.They have an open circulatory system.Their muscular foot is not well adapted for speed.
- 9. Multiple ChoiceWhich of the following is not a potential organ that a mollusk could use for respiration?CtenidiaSimple lungMantleNephridia
- 10. Multiple ChoiceHow do some organisms in the Class Gastropoda increase the speed of their locomotion?They fill their shells with air.They secrete slime from the base of their foot.They drop their heavy shell while hunting for food.They temporarily close their circulatory system.
- 11. Multiple Choice
Is this shell "right-handed" or "left-handed"?Right-handedLeft-handed - 12. Multiple ChoiceWhich of the following is NOT true regarding the bulging portion of a bivalve shell?This is where the muscular foot emerges from.This is where the hinge is located.This is the oldest part of the shell.This is called the umbo.
- 13. Multiple ChoiceWhat is the function of the chromatophores on the mantle of squid, octopus, and cuttlefish?Secreting the shellStinging preyCamouflageMove water over gills
- 14. Multiple ChoiceHow many overlapping plates make up a chiton's shell?71068
- 15. Multiple ChoiceWhat is the main food item consumed by organisms in the Class Polyplacophora?AlgaeFish and small invertebratesPhytoplanktonFish, squid, and some crustaceans (like crabs)
- 16. Multiple ChoiceWhich of the following statements is not true?A squid has 8 arms and 2 tentacles.An octopus has 8 tentacles.A nautilus has 80-90 tentacles.A cuttlefish has 8 arms and 2 tentacles.
- 17. Multiple ChoiceLand snails tend to be hermaphrodites, but many aquatic snails are _____________.MonoeciousAsexualDioeciousSelf-fertilizing
- 18. Multiple ChoiceSome mollusks with tentacles don't have any suckers. What do they use to help grab prey instead?They engulf prey with their visceral mass.Their muscular foot.Small velcro-like hooks on their tentacles.Adhesive secretions on their tentacles.
- 19. Multiple ChoiceWhich of the following facts about the Phylum Mollusca is false?It is the second largest phylum.There are over 90,000 living species in the phylum.There are 6 classes in the phylum.Organisms in this phylum have a 3 part body plan.
- 20. Multiple ChoiceThe oldest part of a gastropod's single valve (shell) is called...UmboApexApertureWhorl
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