Insects ___________________. (Points: 10)
have a cephalothorax and four pairs of legs
have a thorax and three pairs of legs
have radial symmetry and tube feet
have bilateral symmetry and a radula
3. The exoskeleton of arthropods is composed of a substance called _______. (Points: 10)
chitin
spongin
cellulose
collagen
4. Echinoderms ______________________. (Points: 10)
are radially symmetrical as larvae and bilaterally symmetrical as adults
have radially symmetrical exoskeletons as adults
are radially symmetrical as adults and bilaterally symmetrical as larvae
are radially symmetrical as larvae and as adults
5. Having a coelom, jointed legs, and segmented bodies are characteristics of _______. (Points: 10)
sponges
arthropods
echinoderms
annelids
6. Select the phylum that is characterized by possessing segmented bodies. (Points: 10)
Porifera
Echinodermata
Arthropoda
Mollusca
7. Tube feet are short extensions of the ____________. (Points: 10)
digestive system
excretory system
skeletal system
water vascular system
8. Malpighian tubules are _____ structures found in _____. (Points: 10)
reproductive; crustaceans
excretory; insects
respiratory; spiders
skeletal; starfish
9. Scorpions and ticks are classified as _____________. (Points: 10)
crustaceans
insects
diplopods
arachnids
10. For gas exchange, insects use ______ while spiders use _____. (Points: 10)
tracheae; book lungs
gills; tracheae
book lungs; gills
gills; book lungs