Animal Bio Ch11
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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| All of the following are unique to the molluscs except one. Select the exception. | A) mantle
*B) shell*
C) visceral mass
D) head-foot
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| Which of the following is true of the radula of most molluscs? | It is used in rasping food.
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| The mantle of most molluscs | secretes the shell.
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| Which of the following is true of the mantle cavity of a bivalve? | It is the area where water circulates during feeding and gas exchange.
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| The molluscs are most closely related to the | other lophotrochozoans
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| Which of the following is true of the visceral mass of a mollusc? | trochophore larvae and they are lophotrochozoans.
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| All of the following mollusc characters would be found in a member of the class Bivalvia except one. Select the exception. | radula
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| Members of which of the following mollusc classes would be characterized by a shell consisting of 8 plates? | Polyplacophora
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| Members of which of the following mollusc classes would be characterized by a reduced head, a mantle that surrounds the entire body and a tusk-shaped shell? | Scaphopoda
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| Members of which of the following mollusc clases would be characterized by their complex nervous sytems, a head in line with the visceral mass, and a closed circulatory system. | Cephalopoda
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| ______ is a developmental process that occurs in gastropods and results in a 180 degree counterclockwise twisting of the visceral mass and mantle cavity. | Torsion
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| A ______ is a mucoid mass that extends to the stomach of gastropods. It contains trapped food particles and is rotated by cilia. | protostyle
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| Members of the gastropod subclass Pulmonata are predominantly freshwater or terrestrial. Their mantle is modified into a lung, which opens to the outside of the mantle cavity through a/an | pneumostome.
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| Water exits the mantle cavity of a bivalve through the ______ and the excurrent opening. | suprabranchial chamber
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| A ______ is a developmental stage of a freshwater bivalve that is parasitic on fishes. | glochidium
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| Which type of cephalopod possesses an external shell? | nautilus
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| Which of the following is generally accepted as the prevailing explanation behind the evolution of intelligence in cephalopods? | living as active predators as well as actively avoiding predators
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| Members of the classes Cephalopoda and Scaphopoda are the only molluscs that possess closed circulatory systems. | False
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| Cephalopods rely on olfactory senses for detecting prey. | False
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| Members of the class Polyplacophora include the chitons, which are found on hard substrates in marine habitats. | False
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| Most bivalves are dioecious. | True
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| Members of the class Monoplacophora are wormlike molluscs that lack a shell, crystalline style, and foot; they live in vertical burrows on the deep-sea floor. | False
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| Labial palps of bivalves sort filtered food particles delivered by cilia lining the ventral margin of the gills. | True
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| The operculum aids in both respiration and reproduction in gastropods. | False
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| The Gastropoda and the Cephalopoda form a clade characterized by a dorsoventrally elongate body and shell coiling. | True
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| The diversity of body forms and lifestyles present in the phylum Mollusca is an excellent example of adaptive radiation. | True
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| The absence of a shell in the Aplacophora is a primitive character in the phylum Mollusca. | True
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| Fertilization in bivalves is typically internal. | False
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skmmonks
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