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What does "mollusk" mean?
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True/False: Phylum Mollusca is the 2nd largest class?
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Mollusca Test

QuestionAnswer
What does "mollusk" mean? soft-bodied
True/False: Phylum Mollusca is the 2nd largest class? True
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
What is the structure used for locomotion called? foot
How do mollusks complete gas exchange? Through what organs? diffusion; through the gills or lungs
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
How do they reproduce? Sexually
What does cephalopoda mean? the foot is attached to the head
name the tubelike structure through which water enters and leaves a clam's body exhalant and inhalant siphon
What structure secretes calcium carbonate? the mantle
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.
Describe Class Gastropoda? Which organisms belong to this class? foot attached to the stomach; largest class of mollusks, includes abalones, conches, snails, slugs, nudibranchs
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
How many tentacles do octopus and squids have? 8 for octopus and 10 for squid
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)
What does the term "gasto" mean? a foot attached to a stomach
Created by: jlafferty
 

 



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