I
The number of body regions most crustaceans have
What is three?
The stiff bristles on the body of the earthworm
What are setae?
The tiniest crab
What is a pea crab?
The structure that directs the work of the cell
What is the nucleus?
The pair of legs closest to the centipede's ______ is poisonous
What is the mouth?
Five or more rays are formed on the
What is the sea star?
The body region when the head and thorax are joined together
What is cephalothorax?
The threadlike structures in a cell that determine the characteristics of the organism
What are chromosomes?
By releasing poison through the stink glands near its many legs, the ______ defends itself
What is the millipede?
The lobster with no pincers?
What is the spiny lobster?
A small, freshwater lobster
What is the crayfish?
Using its foot as if it were sliding on its stomach allows a ______ to move
What is a gastropod?
The number of legs many crustaceans have
What is ten?
The structure surrounds the cell and protects it
What is the cell membrane?
An invertebrate that builds a protective limestone cup at the base of its body
What is a coral polyp?
Mussels, oysters, clams, scallops are all ______, mollusks having two matching shells
What are bivalves?
Worms are not arthropods because they do not have
What is an exoskeleton or external skeleton?
The crab whose shell covers only the front part of its body
What is the hermit crab?
Most crustaceans breathe with
What are gills?
The jellylike fluid that fills the cell
What is the cytoplasm?
Earthworms enrich the soil with their
What are castings?
A shrimp that searches for parasites and other harmful things on a fish
What is a cleaner shrimp?
The snail is part of a group of one-shelled mollusks called
What are univalves?
The wood louse whose nickname is the roly-poly; expels an offensive odor when attacked
What is the pill bug?
The number of pairs of legs on the body segments of a centipede
What is one?