Mollusca Trivia!

Taxanomic Classes

1

Squids and octopuses belong to this class:

Cephalopoda

2

Slugs, sea slugs, and snails belong to this class:

Gastropoda

3

Scallops, clams, and mussels belong to this class:

Bivalvia

4

What are the 3 classes that most species are found in? (within the Mollusca phylum)

-Gastropoda

-Bivalvia

-Cephalopoda

5

How many species are there in Phylum Mollusca?

85,000

Physical Attributes

1

Do organisms in the Mollusca phylum have a coelem?

Yes

2

True or False:

All organisms in the mollusca phylum have wings.

False

3

What types of symmetry do all organisms in the Mollusca phylum have?

Bilateral symmetry

4

What is the tongue-like organ at the head of most mollusks that allows them to scrape food off of surfaces?

Radula

5

What muscles help close the shell of the bivalve?

Adductor muscle

Functions

1

How does reproduction occur among mollusks?

Sexually

2

Molluscs breathe using...

a) Lungs

b) Gills

c) Photosynthesis

b) Gills

3

Name one way that organisms in the Mollusca phylum move around.

-Jet propulsion 

-Muscular foot-like structure

-Slide/glide on mucus 

4

How many shells do bivalve organisms in the Mollusca phylum have?

a) zero 

b) One 

c) Two 

c) Two 

5

What part of the bivalve shell is the oldest?

Umbo

Organisms

1

What class in the Mollusca phylum does the oyster (Ostreacea) belong to?

Class Bivalvia

2

What class in the Mollusca phylum does the Limax belong to?

Class Gastropoda

3

What are 3 basic body parts common among the Phylum Mollusca?

A mantle, visceral mass, and muscular foot

4

What class do Cuttlefish (Sepiida) belong to within the Mollusca phylum?

Cephalopoda

5

What is used to expel water forcefully, enabling the squid to propel itself through the sea?

Siphon