Chapter 35 Online Quiz (Mollusks And Annelids)

1. Which of the following has a true coelom? A. flatworm B. roundworm C. rotifer D. mollusk

2. The evolution of a coelom was significant because A. more food could be stored within it. B. more wastes could be stored before excretion. C. it enabled development of more complex organ systems. D. it eliminated the need for a circulatory system

3. A characteristic structure found in many mollusks is the radula, which is involved in A. jet propulsion. B. opening and closing of the shell. C. eating. D. reproduction.

4. Which of the following is a correct pairing? A. phylum Platyhelminthes—hydra B. phylum Nematoda—planaria C. phylum Mollusca—octopus D. phylum Annelida—roundworm

5. All of the animal phyla that evolved after the mollusks A. are vertebrates. B. are prokaryotes. C. have a coelom. D. lack mesoderm.

6. Refer to the illustration above. This organism is a A. bivalve. B. cephalopod. C. trochophore. D. gastropod.

8. Shells of mollusks A. may consist of one or more pieces. B. provide protection. C. allow for the attachment of muscles. D. All of the above

9. In an open circulatory system, A. water is drawn into the mantle cavity to provide oxygen to body tissues. B. lungs branch into small tubules to provide oxygen to tissues. C. wastes are eliminated directly to the environment from the tissues. D. blood is released directly into spaces in the body tissues

10. Twisting of the visceral mass of gastropods is called A. extension. B. inversion. C. torsion. D. conversion.

11. All of the cephalopods A. have eight tentacles. B. are predators. C. possess protective shells. D. are filter feeders.

12. Jet propulsion in a squid is the result of A. rapid closing of the organism's shell. B. strong contractions of the tentacles. C. high-pressure discharge of fluid from the organism's mouth. D. the pumping of water through the siphon.

13. The only cephalopod that has retained its external shell is the A. cuttlefish. B. chambered nautilus. C. octopus. D. squid.

14. Segmented worms are known as A. nematodes. B. annelids. C. planarians. D. arthropods.

15. Each segment of an annelid A. is capable of reproduction. B. has a well-developed brain that allows the annelid to learn simple tasks. C. has a pseudocoelom. D. may contain some organ systems that duplicate systems in other segments.

16. An example of segmentation in humans is the A. digestive system. B. skin. C. vertebral column. D. brain.

17. true coelom : mollusks and annelids :: A. tentacle : annelids B. siphon : annelids C. valve : annelids. D. segmentation : annelids

18. Coordinated movements of an earthworm's body segments are possible because of the A. development of an advanced brain. B. ventral nerve cord and ganglia that carry impulses to the muscles. C. presence of a true coelom in the earthworm's body. D. existence of a complete digestive system.

19. Small tubules that collect wastes from the coelom of annelids and discharge the wastes from the body are called A. nephridia. B. radulae. C. bivalves. D. spicules.

20. The digestive tube of the earthworm is divided into three regions. Which of the following is not among these regions? A. crop B. intestine C. radula D. gizzard

21. The advantage of a closed circulatory system over an open circulatory system is that A. blood moves more efficiently through the tubes of a closed circulatory system. B. a closed circulatory system prevents blood from leaking out of the body. C. blood is able to be pumped by a muscular heart in a closed circulatory system. D. lungs are able to function in animals with a closed circulatory system.

22. The clitellum of an earthworm A. contains the heart. B. is associated with reproduction. C. acts as a primitive respiratory system. D. is necessary for movement.

23. Earthworms are considered to be beneficial to the environment because A. they help release nutrients into the soil. B. they aerate the soil as they move through it. C. they break up the soil in which they live. D. All of the above

24. squid motion : siphon :: A. annelid motion : siphon B. annelid breathing : nephridia C. earthworm circulation : closed circulatory system D. annelid motion : tentacles

25. Leeches A. use suckers to aid in movement. B. may be parasitic. C. are segmented. D. All of the above.