1. What is the name given to the process that causes a gastropod's anus to lie above its head?
A. torsion
B. cephalization
C. localization of function
D. detorsion
2. What is the purpose of the chromatophores?
A. transfer waste products from annelids? body cavities
B. remove calcium from leeches? digestive tract
C. change the color of cephalopods
D. close the opening of protective tubes/shells
3. Earthworms have _____ paired hearts, called aortic arches.
A. 3
B. 4
C. 5
D. 7
4. _________ are hairlike structures on most annelids that assist them in gripping structures and crawling.
A. Septa
B. Umbos
C. Glochida
D. Setae
5. Annelids and cephalopods have closed circulatory systems.
A. true
B. false
6. Bivalves use their radula for scraping and tearing prey.
A. true
B. false
7. Mollusks have a __________, which surrounds the visceral mass and produces the substances that form the shell in some species.
A. foot
B. mantle
C. hemocoel
D. parapodium
8. Which organism is considered the most intelligent invertebrate?
A. octopus
B. snail
C. squid
D. barnacle
9. What is the name given to the segments of annelids' bodies?
A. nephridia
B. setae
C. metameres
D. parapodia
10. Which of the following is the only nonsegmented body system in annelids?
A. nervous system
B. excretory system
C. digestive system
D. respiratory system
A. torsion
B. cephalization
C. localization of function
D. detorsion
2. What is the purpose of the chromatophores?
A. transfer waste products from annelids? body cavities
B. remove calcium from leeches? digestive tract
C. change the color of cephalopods
D. close the opening of protective tubes/shells
3. Earthworms have _____ paired hearts, called aortic arches.
A. 3
B. 4
C. 5
D. 7
4. _________ are hairlike structures on most annelids that assist them in gripping structures and crawling.
A. Septa
B. Umbos
C. Glochida
D. Setae
5. Annelids and cephalopods have closed circulatory systems.
A. true
B. false
6. Bivalves use their radula for scraping and tearing prey.
A. true
B. false
7. Mollusks have a __________, which surrounds the visceral mass and produces the substances that form the shell in some species.
A. foot
B. mantle
C. hemocoel
D. parapodium
8. Which organism is considered the most intelligent invertebrate?
A. octopus
B. snail
C. squid
D. barnacle
9. What is the name given to the segments of annelids' bodies?
A. nephridia
B. setae
C. metameres
D. parapodia
10. Which of the following is the only nonsegmented body system in annelids?
A. nervous system
B. excretory system
C. digestive system
D. respiratory system