Multiple Choice
A Nautilus differs from a snail because
A) the snail body occupies the whole shell and the Nautilus mainly lives in the last chamber.
B) the Nautilus is the last representative of a once flourishing group while snails belong to a most abundant modern group.
C) the Nautilus generates gas in the chambers for buoyancy during swimming and a snail does not.
D) All of the choices are differences
E) None of the choices is correct
Correct Answer:

Verified
Correct Answer:
Verified
Q21: The circulatory system of cephalopods is more
Q22: When cephalopods hatch from their eggs,they are<br>A)trochophore
Q23: Cultured pearls are made by<br>A)cutting spherical balls
Q24: The Monoplacophora<br>A)lack a shell.<br>B)live in fresh water.<br>C)lack
Q25: The _ is the layer on the
Q27: The intromittent organ of male cephalopods is
Q28: The membranes that hold the internal organs
Q29: Opisthobranchs and pulmonates are both gastropods.What are
Q30: The _ _ projects into a bivalve
Q31: Which of the following statements is NOT