The ______________ is the layer on the outside of the clam or mussel shell that provides protection from acidic water and may be colored to hide the clam in the mud.
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Q33: Although snails and some other molluscs are
Q34: The membranes that hold the internal organs
Q35: The water current in the body of
Q36: Most freshwater clams have a bivalve _
Q37: Cephalopods feed on
A)microscopic organisms.
B)fish,molluscs,crustaceans,and worms.
C)seaweed.
D)whales and porpoises.
E)None
Q39: The circulatory system of cephalopods is more
Q40: Gaseous exchange in gastropods may involve
A)gills.
B)lungs.
C)mantle.
D)body surface.
E)All
Q41: Cephalopod eyes and vertebrate eyes are anatomically
Q42: Scaphopods have a captacula or head with
Q43: Describe five features,morphological or developmental,that would most
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