Chapter 10: Molluscs

Question 1

Multiple Choice

The characteristics that generally typify molluscs are:

Answer 1

Radula, open circulation, mantle and shell

Question 2

Locomotion in most of the Bivalvia is accomplished by:

Answer 2

A muscular foot

Question 3

Torsion in gastropods caused the mantle cavity and the organs it contained to lie above the…

Answer 3

Head

Question 4

True/False

Most molluscs are found in fresh water, but few live in the ocean or on land

Answer 4

False

Question 5

The edible clams, oysters, and scallops belong to the class:

Answer 5

Bivalvia

Question 6

The group of molluscs which are most endangered are:

Answer 6

Freshwater bivalves

Question 7

Most cephalopod molluscs can change colors because of special pigment cells that are called:

Answer 7

Chromatophores

Question 8

The water current in the body of a cephalopod molluscs provides

Answer 8

All of the above

Question 9

The tongue-like, rasping organ in the head of most molluscs is the

Answer 9

Radula

Question 10

True/False

The molluscs are the second most diverse phylum known

Answer 10

True