The 180 ^$\circ$ ,counterclockwise Twisting of the Visceral Mass,mantle,and Mantle Cavity of Gastropods

Q7: The class of molluscs that contains the

Q8: There are roughly _ described species in

Q9: Tooth shells belong to the molluscan class<br>A)Bivalvia.<br>B)Cephalopoda.<br>C)Polyplacophora.<br>D)Gastropoda.<br>E)Scaphopoda.

Q10: The circulatory system of most molluscs is<br>A)hydraulic.<br>B)incurrent.<br>C)closed.<br>D)excurrent.<br>E)open.

Q11: The gastropod larval stage in which torsion

Q13: The adaptation of bivalves to sedentary,filter feeding

Q14: Molluscs are<br>A)deuterostomes.<br>B)ecdysozoaons.<br>C)lophotrochozoans.<br>D)chordates.<br>E)hemichordates.

Q15: The most complex molluscs belong to the

Q16: The tentacle of male cephalopods that is

Q17: Neopilina represents the molluscan class _,that was