| A | B |
|---|
| arthropod | animal having a segmented body |
| trilobite | sea-dwelling organism belongs in phylum with arthropods |
| chelicerate | 2-part body and mouth parts |
| crustacean | stony exoskeleton |
| uniramian | contains centipedes and insects |
| exoskeleton | systemof supporting structures covering the outside of the body |
| chitin | complex carbohydrate found in arthropodexoskeletons |
| molt | to shed an exteriorlayer of skin/exoskeleton |
| metamorphosis | series of dramatic changes in body form in the life cycle |
| pupa | resting stage of metamorphosis |
| arachnid | chelicerate arthropod that has four pairs of legs |
| mandible | mouthpart designed for biting and grinding food |
| pheromone | specific chemical messenger produced by an organism that affects the behavior of other species |
