Mollusks ­ Chapter 30                                               Name ____________________

Using what you know about the three major classes of mollusks, complete the chart below by checking the correct column or columns for each characteristic.

 

Characteristic

Type of Mollusk

Gastropods

Bivalves

Cephalopods

1.  Intelligent, well developed nervous system

      

2.  Has no distinct head

      

3.  Has an open circulatory system

      

4.  External shells present in some species

      

5.  Bite prey with beak

      

6.  Uses gills for both respiration and food collection

      

7.  All species are carnivorous predators

      

8.  Uses a radula for feeding

      

9.  Can change color for camoflauge

      

10.  Can form pearls

      

11.  Use a type of jet propulsion for movement

      

12.  Has bilateral symmetry

      

13.  Has a two part hinged shell

      

14.  Is an invertebrate

      

15.  Some species are venomous