Opisthobranchs and Pulmonates Are Both Gastropods

Q24: The Monoplacophora<br>A)lack a shell.<br>B)live in fresh water.<br>C)lack

Q25: The _ is the layer on the

Q26: A Nautilus differs from a snail because<br>A)the

Q27: The intromittent organ of male cephalopods is

Q28: The membranes that hold the internal organs

Q30: The _ _ projects into a bivalve

Q31: Which of the following statements is NOT

Q32: Most freshwater clams have a bivalve _

Q33: The circulatory system of cephalopods is more

Q34: Cephalopods feed on<br>A)microscopic organisms.<br>B)fish,molluscs,crustaceans,and worms.<br>C)seaweed.<br>D)whales and porpoises.<br>E)None