Name: 
 

Other Animal Systems



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

 1. 

Which of the following is an advantage of a complete digestive system over a gastrovascular cavity?
a.
Extracellular digestion is not needed.
b.
Specialized regions are possible.
c.
Digestive enzymes can be more specific.
d.
Extensive branching is possible.
e.
Intracellular digestion is easier.
 

 2. 

In which animal does blood flow from the pulmocutaneous circulation to the heart before circulating through the rest of the body?
a.
annelid
b.
mollusc
c.
fish
d.
frog
e.
insect
 

 3. 

Which of the following are the only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart?
a.
amphibians
b.
birds
c.
fishes
d.
mammals
e.
reptiles
 

 4. 

Organisms categorized as osmoconformers are most likely
a.
terrestrial.
b.
marine.
c.
amphibious.
d.
found in freshwater streams.
e.
found in freshwater lakes.
 

 5. 

In addition to their role in gas exchange, fish gills are also directly involved in
a.
digestion.
b.
osmoregulation.
c.
thermoregulation.
d.
the excretion of uric acid.
e.
the release of atrial natriuretic proteins.
 

 6. 

Which of the following is a nitrogenous waste that requires hardly any water for its excretion?
a.
amino acid
b.
urea
c.
uric acid
d.
ammonia
e.
nitrogen gas
 

 7. 

Which organism(s) has excretory structures known as protonephridia?
a.
flatworms
b.
earthworms
c.
insects
d.
vertebrates
e.
both C and D
 

 8. 

Which organism(s) has excretory organs known as Malpighian tubules?
a.
earthworms
b.
flatworms
c.
insects
d.
jellyfish
e.
both A and B
 



 
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