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 srtuctures | observable parts of an organism, such as the stem of a plant or the carapace of the crayfish |
| crustaceans | class of mostly aquatic animals that have hard, flexible shells, jointed legs,and two pairs of antennae |
| antennae | feelers on a crayfish |
| bristles | the short hairs on a crayfish that help them sense things in the environment |
| carapace | the main body shell of crustaceans |
| swimmerets | small leg-like structures under the tail of the crayfish |
| pincers | the big jointed leg-like structures in the front of the crayfish |
| elodea | a kind of aquatic plant that crayfish eat |
| habitat | where an animal lives |
| behavior | things that animals do |
| territory | the part of an animals habitat that it defends against others of its own kind |
| crayfish have observable structures such as ? | legs,eyes,antennae,carapace,swimmerets,tail,pincers,and mouth nparts |
| crayfish need: | 1. clean cool water, 2. food from plants and animals, 3. shelter |
| the things animals do are what? | behaviors |