Gastropods that have a shell have a _______. 

What is the key characteristic of mammals?

What type of symmetry is shown below? jellyfish.png

Match the information to the correct type of mollusk. 

This organism is a(n) ____.  640px-Nautilus_side.jpg

Match the appropriate term to the image below. aurelia life cycle.png

Which of the following structures do arthropods use for respiration?

To what subphylum do all the vertebrates belong?

What structure detects movements and vibrations in the water?

What is the name of the organism in the image below? errant marine worm pic.png