Term
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Definition
| soft area containing internal organs of mollusk |
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Term
| what covers the visceral mass of mollusks? |
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Definition
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Term
| How are mollusk shells formed? |
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Definition
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Term
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Definition
| file-like, in mouth of mollusks |
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Term
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Definition
| in mollusks, at outside of body, receives digestive and metabolic wastes, gametes |
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Term
| T/F: the crop performs digestion |
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Definition
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Term
| What type of digestive system is present in mollusks? |
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Definition
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Term
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Definition
| remove nitrogenous wastes |
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Term
Which of the following is not true of the mollusks?
A. nephridia are present
B. all have a closed circulatory system
C. a reduced true coelom is present
D. the hand is used for locomotion and burrowing
E. two of the above |
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Definition
E. (B and D)
mollusks may have an open or closed circulatory system,
the foot is used for locomotion and burrowing |
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Term
| T/F: mollusks have capillaries and hemocoel |
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Definition
| F. they do not have capillaries, but do have hemocoel |
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Term
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Definition
| body cavity of mollusks where blood circulates |
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Term
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Definition
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Term
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Definition
| mollusks- bivalves (clams, mussels, oysters) |
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Term
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Definition
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Term
Which of the following is not true of the bivalves?
A. have marked cephalization
B. are filter feeders
C. have 3 ganglia
D. are unisexual
E. have gills |
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Definition
| A. they have little cephalization |
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Term
Which of the following is true of the bivalves?
A. they are active swimmers
B. they have an open circulatory system
C. they have a well developed brain
D. they exchange oxygen through the mantle
E. they are omnivores with radula |
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Definition
B.
they are sessile, only have 3 ganglia, exchange oxygen with gills, and are filter feeders |
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Term
Which of the following is not true of the cephalopods?
A. are unisexual
B. have no shell or an internal shell
C. move with jet propulsion
D. have a radula
E. all are true |
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Definition
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Term
Which of the following is true of the cephalopods?
A. are slow crawlers
B. have 4 tentacles, 2 with eyes
C. have a well developed brain
D. are sequential hermaphrodites
E. are filter feeders |
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Definition
C.
they are active swimmers, have tentacles but eyes are on body, are unisexual, and are predators |
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Term
Which of the following is not true of the Gastropods?
A. have 180* torsion
B. have 1 coiled shell
C. have a closed circulatory system
D. are omnivores
E. more than one of the above |
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Definition
| C. they have an open circulatory system |
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Term
Which of the following is true of the gastropods?
A. exchange oxygen through the mantle
B. have 3 ganglia
C. are filter feeders
D. have jet propulsion
E. have little cephalization |
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Definition
A.
they have about 6 ganglia, are omnivores with a radula, are slow crawlers, and have marked cephalization |
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Term
| sequential hermaphrodites |
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Definition
| immature male develops into mature female |
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Term
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Definition
| in gastropods, back end curled on top of front |
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Term
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Definition
| in gastropods, so the anus is not directly above mouth/ head |
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