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Ch. 30 Test B

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
In chordates, the long supporting rod that runs through the body is called the
a.
nerve cord.
c.
pharyngeal pouch.
b.
notochord.
d.
tail.
 

 2. 
A vertebrate is any chordate that has a
a.
backbone.
b.
notochord.
c.
hollow nerve cord.
d.
tail that extends beyond the anus.
 

 3. 
The two groups of nonvertebrate chordates are
a.
tunicates and lancelets.
b.
skates and rays.
c.
frogs and toads.
d.
lungfishes and coelacanths.
 

 4. 
Most fishes are characterized by each of the following EXCEPT
a.
a cartilaginous skeleton.
c.
paired fins.
b.
scales.
d.
gills.
 

 5. 
The first vertebrates to evolve were
a.
amphibians.
c.
tunicates.
b.
lancelets.
d.
fishes.
 

 6. 
In fishes with gills, oxygen-rich water enters through the
a.
mouth and leaves through openings in the pharynx.
b.
mouth and leaves through the bladder.
c.
openings in the pharynx and leaves through the mouth.
d.
openings in the pharynx and leaves through the anus.
 

 7. 
Blood flows through the body of a fish in a
a.
single-loop, open circulatory system.
b.
single-loop, closed circulatory system.
c.
double-loop, open circulatory system.
d.
double-loop, closed circulatory system.
 

 8. 
The organ that adjusts the buoyancy of many bony fishes is the
a.
swim bladder.
c.
ventricle.
b.
cerebellum.
d.
kidney.
 

 9. 
Modern jawless fishes include
a.
skates.
c.
lampreys.
b.
sharks.
d.
lungfishes.
 

 10. 
Which of the following is NOT a characteristic of most amphibians?
a.
They live on land as adults.
b.
They breathe with lungs as adults.
c.
They have moist skin that contains mucous glands.
d.
They have scales and claws.
 

 11. 
The first amphibians probably resembled
a.
jawless fishes, like the lamprey.
b.
cartilaginous fishes, like the skate.
c.
lobe-finned fishes, like the coelacanth.
d.
ray-finned fishes, like the salmon.
 

 12. 
In the digestive system of a frog, where does food go after it leaves the mouth?
a.
to the gallbladder
c.
to the cloaca
b.
to the esophagus
d.
to the pancreas
 

 13. 
In a frog, the cavity through which digestive wastes, urine, and eggs or sperm leave the body is the
a.
cloaca.
c.
gallbladder.
b.
colon.
d.
pancreas.
 

 14. 
The eggs of amphibians can dry out easily because they
a.
are never encased in jelly.
b.
do not have shells.
c.
are usually laid on land.
d.
are always fertilized externally.
 
 
nar001-1.jpg

Figure 30–1
 

 15. 
The amphibian in Figure 30-1 is a
a.
caecilian.
c.
salamander.
b.
frog.
d.
toad.
 

Completion
Complete each statement using the word bank.
amphibians       cartilage       smell       three       vertebrae
 

 16. 
Individual segments of the backbone are called ____________________.
 

 

 17. 
The skeletons of some ancient fishes were made of ____________________, which is softer and more flexible than bone.
 

 

 18. 
Adult salmon can distinguish their home stream from other streams by using their sense of ____________________.
 

 

 19. 
The Carboniferous Period is sometimes referred to as the Age of ____________________.
 

 

 20. 
An adult amphibian’s heart has ____________________ chambers.
 

 



 
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