The newest clam shell is built
A) on the outside so the periostracum is the newest material.
B) on the inside so the inside nacreous layer is the newest.
C) both directions outward from the central prismatic layer.
D) all at once;all layers of shell are the same age.
E) None of the choices is correct
Correct Answer:
Verified
Q11: Where would you locate the coelomic cavity
Q12: Some prosobranchs have only one _ in
Q13: The genus _ contains some members that
Q14: Early gastropods had a coiled shell that
Q15: The nudibranchs belong to the
A)scaphopoda.
B)pelecypoda.
C)prosobranchia.
D)opisthobranchia.
E)pulmonata.
Q17: Torsion
A)involves movement of the shell independent of
Q18: Clams burrow by using
A)adductor muscles.
B)cilia action.
C)gills for
Q19: The central axis around which the shell
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