For the animal shown to the right, select the correct choices for all characteristics. Use the buttons to see additional animals, check your answers, or see comments about the animal shown.
Phylum:
Porifera
Cnidaria
Platyhelminthes
Nematoda
Rotifera
Annelida
Arthropoda (non-insect)
Arthropoda (insect)
Mollusca (non-cephalopod)
Mollusca (cephalopod)
Chordata (vertebrate)
Digestion:
diffusion only
a gastrovascular cavity
a gut tube
Respiration:
diffusion only
gills or lungs
tracheae
Circulation:
diffusion only
an open system
a closed system
Excretion:
diffusion only
flame cells
nephridia
green glands
malpighian tubules
Support:
no skeleton
spicules
a hydrostatic system
a shell
an exoskeleton
an endoskeleton
