Unit 4 Study Set

Class Cephalopoda use...to move through the water.

• suckers

• jet locomotion

• teleportation

• legs

What characteristics are associated with Phylum Mollusca? Select all that apply.

• soft bodies

• muscular foot

• exoskeleton

• radula

What Phylum do many scientists believe are most closely related to organisms in the Phylum Mollusca?

• Nematoda

• Annelida

• Porifera

• Cnidaria

Which of the following are examples of mollusks?

• snails

• slugs

• octopi

• worms

What is one piece of evidence that shows that mollusks and segmented worms are related?

• both have legs

• both have arms

• both have coelems

• both have multiple stomachs

Which body part often secretes an external shell?

• radula

• mantle

• beak

• foot

Which of the following is NOT a class of Phylum Mollusca?

• Bivaliva

• Scaphopoda

• Arthropoda

• Aplacophora

Which class do octopus and squid belong to?

• Cephalopoda

• Monoplacophora

• Polyplacophora

• Arthropoda

What is the function of a radula?

• shedding the exoskeleton

• producing offspring

• scraping or cutting food

• growing limbs

How are natural pearls made?

• by oysters

• by squids

• by slugs

• by snails