The section of a mollusk containing nearly all of the internal organs is the

The tissue in mollusks that secretes the shell is called the

Which of the following animals belongs to class Polyplacophora?

Pictured on the bottom of this squid, what is the name for the tube that is used to rapidly expel water?

Male cephalopods create these packets of sperm to help increase the chance of successful fertilization.

While mollusks typically breathe through gills, echinoderms often breathe through their

Without blood, echinoderms are left to transport nutrients and wastes using their

This snail belongs to which mollusk class which means "gut-foot"?

These clams belong to which mollusk class which means "two halves"?

This cuttlefish belongs to which mollusk class which means "head-foot"?

Torsion (meaning "twisted") allows the visceral mass of snails to twist up inside of their shells. This feat allows protection for which other part of their body?

Which type of symmetry do we observe in echinoderms?

This brittle star belongs to which echinoderm class meaning "snake tail form"?

How do sea stars reproduce? Choose ALL that apply.

Which mouthparts are seen in mollusks? Choose ALL that apply.

I am an octopus with a heart and blood vessels. My blood always remains within my blood vessels (unless I'm injured of course). Which type of circulatory system do I have?

How do sea cucumbers defend themselves?

Which structure does letter A represent?

Which structure does letter B represent?

Which structure does letter B represent?

Which structure does letter C represent?

Which structure does letter E represent?