Classifying Invertebrates: Mollusks

What phylum do mollusks belong to?

• Mollusca

• Annelida

• Chordata

• Arthropoda

Name the three main classes of mollusks.

• Bivalvia, Platyhelminthes, Nematoda

• Mollusca, Arthropoda, Annelida

• Gastropoda, Bivalvia, Cephalopoda

• Gastropoda, Isopoda, Cephalopoda

What is the primary characteristic of mollusks?

• Soft body and hard shell

• Rigid body and soft shell

• Hard body and soft shell

• Soft body and soft shell

Which class of mollusks includes snails and slugs?

• Anthozoa

• Gastropoda

• Cephalopoda

• Bivalvia

What is the hard outer shell of mollusks called?

• carapace

• exoskeleton

• armor

• shell

How do cephalopods differ from other mollusks?

• Cephalopods have an exoskeleton

• Cephalopods have a modified foot, closed circulatory system, and advanced nervous system.

• Cephalopods lack a nervous system

• Cephalopods have an open circulatory system

Tags

NGSS.MS-LS4-2

What is the function of the radula in mollusks?

• Scraping food particles from surfaces

• Filtering water for oxygen

• Producing light for camouflage

• Storing excess nutrients

What is the largest class of mollusks?

• Gastropoda

• Arachnida

• Cephalopoda

• Bivalvia

Which class of mollusks includes octopuses and squids?

• Cephalopoda

• Mollusca

• Gastropoda

• Bivalvia

What is the name of the muscular foot found in mollusks?

• Muscular foot

• Tentacle

• Pincer

• Fin