The central axis around which the shell of a snail coils is called the
A) aperture.
B) columella.
C) sinistral.
D) dextral.
E) torsion.
Correct Answer:
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Q14: Early gastropods had a coiled shell that
Q15: The nudibranchs belong to the
A)scaphopoda.
B)pelecypoda.
C)prosobranchia.
D)opisthobranchia.
E)pulmonata.
Q16: The newest clam shell is built
A)on the
Q17: Torsion
A)involves movement of the shell independent of
Q18: Clams burrow by using
A)adductor muscles.
B)cilia action.
C)gills for
Q20: Snails were discovered in the Negev desert
Q21: Of all of the freshwater organisms,more freshwater
Q22: Snails that lack gills are called "pulmonate"
Q23: Which of the following statements is NOT
Q24: The tongue-like,rasping organ in the head of
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