Download Sponges to Ecdysozoans Practice Exam

Practice Exam- Sponges through Ecdysozoans
1. Which of the following is not a distinguishing characteristic of animals?
a. the capacity to move at some point in their life cycle
b.possession of cell walls
c. multicellularity
d.heterotrophy
e. All of the above are characteristics of animals.
2. Bilateral symmetry is strongly correlated with
a. the ability to move through the environment.
b.cephalization.
c. the ability to detect prey.
d.a and b.
e. a, b, and c.
3. In triploblastic animals, the inner lining of the digestive tract is derived from
a. the ectoderm.
b.the mesoderm.
c. the endoderm.
d.the pseudocoelom.
e. the coelom.
4. Pseudocoelomates
a. lack a fluid-filled cavity.
b.have a fluid-filled cavity that is completely lined with mesoderm.
c. have a fluid-filled cavity that is partially lined with mesoderm.
d.have a fluid-filled cavity that is not lined with mesoderm.
e. have an air-filled cavity that is partially lined with mesoderm.
5. Choanocytes are
a. a group of protists that are believed to have given rise to animals.
b. specialized cells of sponges that function to trap and eat small particles.
c. cells that make up the gelatinous layer in sponges.
d. cells of sponges that function to transfer nutrients to other cells.
e. cells that form spicules in sponges.
6. Why aren't sponges eaten more by predators?
a. They are protected by silica spicules.
b. They are protected by toxic defensive chemicals.
c. They are eaten; it's just that the leftover cells reaggregate into new, smaller
sponges.
d. Both a and b are correct.
e. a, b, and c are correct.
7. Which of the following organisms can produce female offspring through
parthenogenesis?
a. cnidarians
b. flukes
c. choanocytes
d. rotifers
e. annelids
8. What organisms can survive without a mouth, digestive system, or anus?
a. cnidarians
b. rotifers
c. echinoderms
d. cestodes
e. nematodes
9. Which phylum does not have at least some members with a closed circulatory system?
a. Lophophorata
b. Arthopoda
c. Annelida
d. Mollusca
e. All of the above phyla have some members with a closed circulatory system.
10. In arthropods, the tracheal system is
a. a unique set of structures that function in ingestion and digestion of food.
b. a series of branching tubes extending into the body that allow for gas exchange.
c. a series of tubules that allow waste products in the blood to be released into the
digestive tract.
d. the series of ommatidia that form the compound eye.
e. none of the above.
11. Characteristics of the class Arachnida include
a. two tagmata.
b. six walking legs.
c. an aquatic lifestyle.
d. a lobed body.
e. both b and d.
12. Incomplete metamorphosis
a. is characterized by distinct larval and adult stages that do not compete for
resources.
b. is typically seen in arachnids.
c. involves gradual changes in life stages where young resemble the adult stage.
d. is characteristic of the majority of insects.
e. always includes a pupal stage.