The skeleton plates of echinoderms are made from:

Arthropods have limbs and appendages that are:

Chitons would be found in the class:

When photographing a crime scene, the recommended procedure is to start at the center of the scene and work outwardly, including all entrances and exits to the scene.

Skid marks made by a vehicle can be used to determine

A horseshoe crab would be found in which of the following classes?

The chemorecptors found on Arthropods are actually:

Match the description with the correct term. 

Match the Mammalian Order with the correct organism.

The inner layer of a mollusk’s shell is the: