Mollusks STAA

Terms

100

A soft-bodied invertebrate that usually has an internal or external shell.

What is a mollusk ?

200

Cephalopods have a big head but no brain. True or False.

What is False ?

300

Give 2 reasons Mollusks are useful to humans.

What is food, water quality indicators, pollution clean-up, friends, neurological study, beauty, bait, ect...

400

A fluid-filled cavity, lined with mesoderm.

What is Coelom ?

500

What is Psuedocoelom ?  

A body cavity not lined with mesoderm

Body Functions

100

A species that eats decaying organisms or detritus.

What is a Detritovore ?

200

Circulatory system with no vessels. Organs are bathed in blood.

What is Open Circulatory System ?

300

Squid have a(n) __________ circulatory system.

What is closed ?

400

An efficient circulatory system with blood vessels

Closed

500

Tonge-like organ covered in sharp teeth

Radula

What Class

100

Snail

What is Gastropod ?

200

Octopus

What is Cephalopod ?

300

Clam

What is Bivalve ?

400

Squid

What is Cephalopod ?

500

Cuttlefish

What is Cephalopod ?

Miscellaneous

100

Having both male and female reproductive organs.

What is Hermaphrodite ?

200

The muscular foot of most cephalopods evolved into what?  

Arms and/or Tentacles

300

Where is the squid's shell?

Inside their body...The Beak

400

Squid are soft-bodied.  What helps them keep their big head upright?  

Pens

500

The free-swimming larva stage of most Mollusks.

What is trochophore ?