1. Animals are NOT 
a. heterotroph.
b. autotroph.
c. eukaryotes.
d. multicellular.
e. all of the above

Correct answer is: b. . autotroph.

See page 589 in Campbell Biology 4e

2. Most animal phyla live in 
a. marine water.
b. fresh water.
c. arid land.
d. moist land. 
e. rivers.

Correct answer is: a. . marine water.

See page 590 in Campbell Biology 4e

3. Radiata are _ and do not have a _. 
a. tripoblastic/endoderm
b. tripoblastic/mesoderm
c. diploblastic/endoderm
d. diploblastic/mesoderm
e. diploblastic/ectoderm

Correct answer is: d. . diploblastic/mesoderm

See page 592 in Campbell Biology 4e

4. Human zygotes undergo _ and we are therefore _ .
a. determinate cleavages/protostomes
b. indeterminate cleavages/deuterostomes
c. determinate cleavages/deuterostomes
d. indeterminate cleavages/protostomes
e. indeterminate cleavages/coelomates

Correct answer is: b. . indeterminate
cleavages/deuterostomes

See page 593 in Campbell Biology 4e

5. Amoebocytes are 
a. amoebae living in symbiosis with sponges.
b. reproductive cells of sponges.
c. food filtering cells in sponges.
d. mobile cells within sponges.
e. flagellaless stages of sponge cells.

Correct answer is: d. . mobile cells within sponges.

See page 595 in Campbell Biology 4e

6. Jellyfish are an example of
a. cnidaria.
b. medusas.
c. eumetazoas.
d. radiata.
e. all of the above

Correct answer is: e. . all of the above

See page 596 in Campbell Biology 4e

7. Tentacles of hydra have _ with stinging capsules _. 
a. medusa/choanocytes
b. amoebocytes/nettles
c. cnidocytes/nematocysts
d. polyps/nematocysts
e. nematocysts/cnidarians

Correct answer is: c. . cnidocytes/nematocysts

See page 596 in Campbell Biology 4e

8. The medusa and the polyps represent 
a. the diploid and haploid forms of Cnidaria.
b. the haploid and diploid form of cnidaria.
c. the haploid or diploid form of a cnidaria, depending on
the class.
d. two types of haploid forms of cnidaria.
e. two types of diploid forms of cnidaria.

Correct answer is: e. . two types of diploid forms of
cnidaria.

See page 598 in Campbell Biology 4e

9. An important distinction between cnidaria and
platyhelminthes is 
a. the size.
b. the development of true tissues.
c. the formation of a gastrula stage.
d. the formation of a third germ layer.
e. the formation of a coelom.

Correct answer is: d . the formation of a third germ layer.

See page 599 in Campbell Biology 4e

10. What enables planarians to live in fresh water? 
a. The diffusion of nitrogenous waste through the cells.
b. Flame cells that help waft fluids out of the body.
c. The development of eyespots.
d. The carnivorous feeding type.
e. The third germ layer.

Correct answer is: b. . Flame cells that help waft fluids
out of the body.

See page 600 in Campbell Biology 4e

11. Flukes that live in a human 
a. reproduce asexually.
b. reproduce sexually.
c. are digested in the human intestines.
d. were introduced when the person ate snails.
e. have a symbiotic relationship with the human.

Correct answer is: b. . reproduce sexually.

See page 600 in Campbell Biology 4e

12. The pseudocoelomates do probably NOT have 
a. homologous pseudocoelomes.
b. analogous pseudocoelomes.
c. a bilateral symmetry.
d. a mesoderm.
e. a complete digestive tract.

Correct answer is: a. . homologous pseudocoelomes.

See page 602 in Campbell Biology 4e

13. Parthenogenesis means that 
a. the male organism is much smaller than the female
organism.
b. the male organism can not feed itself.
c. eggs are not fertilized before they develop into a new
generation.
d. fertilized eggs form resistant zygotes.
e. all of the above

Correct answer is: c. . eggs are not fertilized before they
develop into a new generation.

See page 602 in Campbell Biology 4e

14. Annelids use _ to remove waste from blood and the
coelomic fluid.
a. lophophores
b. gills
c. metanephridia
d. gizzards
e. septa

Correct answer is: c. . metanephridia

See page 607 in Campbell Biology 4e

15. Most species known to humans belong to the phylum
of the 
a. rotifera.
b. nematoda.
c. annelida.
d. arthropoda.
e. chelicerates.

Correct answer is: d. . arthropoda.

See page 607 in Campbell Biology 4e

16. Arthropods are characterized by 
a. a cuticle.
b. extensive cephalization.
c. open circulatory system.
d. specialization of segments.
e. all of the above

Correct answer is: e. . all of the above

See page 610 in Campbell Biology 4e

17. Horseshoe crabs are the closest related to 
a. lobsters.
b. chambered nautiluses.
c. trilobites.
d. spiders.
e. beetles.

Correct answer is: d. . spiders.

See page 612 in Campbell Biology 4e

18. Which of the following arthropoda appendages has a
different origin than the other ones? 
a. walking legs
b. mandibles
c. antennae
d. chelicerae
e. wings

Correct answer is: e. . wings

See page 615+619 in Campbell Biology 4e

19. Grubs are NOT 
a. a larval stage.
b. an insect.
c. uniramians.
d. annelids.
e. an asexual generation.

Correct answer is: d. . annelids.

See page 618 in Campbell Biology 4e

20. During the Cambrian explosion 
a. the majority of modern phyla evolved.
b. meteorite impact extinguished most species.
c. volcanic activity changed the species composition on
earth.
d. most modern species evolved.
e. evolution of modern species began.

Correct answer is: a. . the majority of modern body plans
evolved.

See page 623 in Campbell Biology 4e