Exam 11: Molluscan Success

Which of the following is not a member of the class Bivalvia?

Muscles responsible for closing the bivalve shell are

Among molluscs,extension of body structures such as tentacles is accomplished by

In some gastropods,a(n)__________ is found on the dorsal,posterior margin of the foot and when the foot is drawn into the shell,seals the opening.

Sperm packets of cephalopods are called

The oldest part of the bivalve shell is the

The space between the mantle and foot in a mollusc is called the

The rasping structure occurring in the mouth of most molluscs is the

The only living cephalopods that possess an external shell are the

The inner layer of the mollusc shell is the __________ layer.

Snails,slugs,and limpets belong to the molluscan class

Squids,octopuses,cuttlefishes,and nautili belong to the molluscan class

In gastropods,food is trapped in mucus and incorporated into a rotating mucoid mass called the __________,which extends to the stomach.

The body of molluscs is divided into two main regions called the

The primary excretory product of aquatic gastropods is

The similarity of design between the eyes of vertebrates and the eyes of many cephalopods provides an excellent example of

Unlike other molluscs,the __________ have a closed circulatory system.

The diversity of body forms and life-styles in the phylum Mollusca is an excellent example of