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End of Chapter Quiz
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1
Sponges possess unique, collared flagellated cells called
A)cnidocytes.
B)choanocytes.
C)choanoflagellates.
D)epithelial cells.
2
Which of the following characteristics is not seen in the flatworms?
A)cephalization
B)the presence of a mesoderm
C)specialization of digestive tract
D)bilateral symmetry
3
One difference between the pseudocoel found in the phylum Nematoda (roundworms) and the coelom found in the phylum Annelida (segmented worms) is the pseudocoel develops between the mesoderm and the _____________ in roundworms, and the coelom develops in the _____________ in segmented worms.
A)ectoderm; mesoderm
B)endoderm; mesoderm
C)ectoderm; endoderm
D)endoderm; ectoderm
4
The main limiting factor of arthropod size is the
A)limited weight the jointed appendages can hold up.
B)weight of the muscles needed to move the organism.
C)weight of the thick exoskeleton needed to support very large insects.
D)entire weight of the organism that would crush the soft body of the arthropod during molting.
5
Echinoderms take on radial symmetry as adults. Some biologists explain this change in symmetry as an adaptation for
A)an animal traveling through its environment, rather than a sessile lifestyle.
B)an animal with a sessile lifestyle, rather than on that moves through its environment.
C)a predator, rather than a filter feeder.
D)an animal living in a marine environment, rather than a freshwater environment.
6
All fish species share all of the following characteristics except
A)gills.
B)jaws.
C)endoskeleton with dorsal nerve cord.
D)single loop circulatory system.
7
Chondrichthyes (sharks) and Osteichthyes (bony fish) have evolved anatomical solutions to increase swimming speed and maneuverability. Which of the following modifications is not found in Osteichthyes?
A)a lateral line system
B)buoyancy control through swim bladders
C)an internal skeleton made of cartilage
D)an operculum
8
Adaptations that evolved in reptiles that allow them to overcome dehydration do not include
A)an amniotic egg.
B)a layer of scales on the skin.
C)more effective arrangement of appendages.
D)modifications to the respiratory system.
9
Characteristics that evolved in birds to allow for flight include
A)reptilian-like scales on the legs.
B)a hard-shelled amniotic egg.
C)internal fertilization.
D)thin, hollow bones in the skeleton.
10
A characteristic unique to almost all mammals and no other vertebrates is
A)a notochord.
B)skin that offers insulation and protection from dehydration.
C)a placenta.
D)endothermy.





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