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Phylum Annelida
Practice Quiz
This practice quiz is a tool to help you study for "real" quizzes and tests. The answers to each question, along with a brief explanation, can be found by scrolling down towards the bottom of the page.

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1. True or False: Annelids have a organ system level of organization.

2. Annelids have
a. radial symmetry
b. bilateral symmetry
c. no symmetry
d. pentameral symmetry
e. cubic symmetry

3. Annelids have which basic body plan?
a. colonial polyps
b. a hollow cavity with pores
c. a muscular foot and a shell
d. jointed exoskeleton
e. repeating segments

4. Most marine annelids
a. are in the Class Scyphozoa
b. are in the Class Gastropoda
c. are in the Class Holothuroidea
d. are in the Class Polychaeta
e. none of the above are true

5. A characteristic feature of annelids is
a. nematocysts, which are stinging structures on their tentacles
b. collar cells, which pump water through their bodies
c. parapodia, which are paired extensions on each body segment
d. radula, which is a ribbon of small teeth used in feeding
e. exoskeleton, which is made of chitin

6. Which of the following is a type of lifestyle practiced by marine annelids
a. carnivory
b. scavenging
c. deposit feeding
d. only a and b are correct
e. a, b, and c are all correct

Answers

1. True, annelids have organ systems, including a nervous system and a closed circulatory system.

2. b, annelids have bilateral symmetry.

3. e, annelid worms have bodies that consist of a series of similar, repeating compartments or segments.

4. d, almost all marine annelids are in the Class Polychaeta

5. c, a diagnostic characteristic of annelids is that each body segment has a pair of flattened extensions or parapodia that sometimes have sharp bristles (or setae).

6. e, polychaete worms (marine annelid worms in the Class Polychaeta) have diverse lifestyles that include deposit feeding, carnivory, and scavenging.