A
this means part of the animal's body match up with other parts around a midpoint of line
symmetry
an animal without a backbone is called this
invertebrate
the simplest kind of invertebrate
sponge
an animal with armlike parts called tentacles
cnidarians
soft-bodied invertebrates
mollusks
clams and oysters are part of this group
mollusks
have spiny skin
echinoderms
internal support structure
endoskeleton
largest invertebrate group
arhtropods
have jointed legs and a body that is divided into sections
arthropods
hard covering that protects the body
exoskeleton
which group does not belong in the arthropods section:
insects
arachnids
crustaceans
clams
clams
these have one pair of antennae and 3 pairs of legs
insects
ticks and spiders are in this group
arachnids
crabs and shrimp are in this group
crustaceans
these have one pair of legs on each body section
centipedes
this group can chew
crustaceans
8
there are how many types of worms
3
an animal with a backbone is called this
vertebrate
these worms have flat bodies
flatworms
this group has four pairs of legs and fangs
arachnids
these worms have thin bodies and pointed ends
roundworms
these types of worms live on land
segmented worms
lobsters are part of this group
arthropds