Mollusca Test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What does "mollusk" mean? | soft-bodied
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| True/False: Phylum Mollusca is the 2nd largest class? | True
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| What type of circulatory system do mollusks have? | Classes Bivalvia and Gastropoda have an open circulatory system whereas Class Cephalopoda has a closed circulatory system
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| What is the structure used for locomotion called? | foot
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| How do mollusks complete gas exchange? Through what organs? | diffusion; through the gills or lungs
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| How many tissue layers do phylum mollusca have and what are they and the systems they create? | 3; endoderm, ectoderm and mesoderm. Endoderm creates the digestive system; ectoderm creates the skin system and mesoderm creates the skeletal, muscular, reproductive systems
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| How do they reproduce? | Sexually
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| What does cephalopoda mean? | the foot is attached to the head
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| name the tubelike structure through which water enters and leaves a clam's body | exhalant and inhalant siphon
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| What structure secretes calcium carbonate? | the mantle
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| Describe Class Cephalopoda? Which organisms belong to this class? | Foot attached to the head; well-developed nervous system and large brain, closed circulatory system system, beak and sometimes venom, octopus has 8 and squids have 10 tentacles. Octopus, squids, and nautilus are examples.
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| Describe Class Gastropoda? Which organisms belong to this class? | foot attached to the stomach; largest class of mollusks, includes abalones, conches, snails, slugs, nudibranchs
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| Describe Class Bivalvia? | hinge attaches two shells; strong adductor muscles control opening/closing of shells, calcium carbonate is secreted from the mantle to form the shell. Organisms include clams, mussels, scallops and oysters
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| How many tentacles do octopus and squids have? | 8 for octopus and 10 for squid
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| How do mollusks obtain nutrients? | Cephalopods obtain nutrients by predatory means by using their beak-like jaws to capture prey and some produce venom. Bivalves are filter-feeders and Gastropods are herbivores (snails & slugs)
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| What does the term "gasto" mean? | a foot attached to a stomach
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Created by:
jlafferty