| A | B |
|---|
| abdomen | the last of the three body parts |
| adaptation | a special trait that helps an organism survive |
| arthropod | any of the joint footed animals |
| crustacean | a class of arthropods with segmented bodies, shell-like exoskeletons, & paired, jointed limbs |
| environment | all the surrounding physical conditions that affect an organism |
| gills | the respiratory organ of crayfish located above the walking legs |
| mandibles | jaws |
| molting | the process of shedding and replacing the exoskeleton |
| pincers | large claws |
| rostrum | a hard beaklike projection on the carapace between the eyes on a crayfish |
| stimulus | a change in the environment that causes an organism to do something |
| tail | the last segment (part) of the abdomen used forswimmin, balance, and protecting eggs |
| vulnerable | capable of being hurt or damaged |
