Question 1

An entomologist observed a locust sitting on a branch pumping its abdomen like an accordion.What is the insect most likely doing?

Accepted Answer

A)  Speeding the flow of blood through its veins and arteries
B)  Assisting gas exchange in the tracheal system
C)  Clearing its spinnerets
D)  Stretching out its pedipalpsE) A) and D)
F) B) and C)

Question 2

Scorpions have a prosoma,pedipalps that are modified into claws,and chelicerae.Which taxonomic group are they a member of?

Accepted Answer

A)  Chelicerata
B)  Hexapoda
C)  Crustacea
D)  MyriapodaE) B) and C)
F) A) and B) A

Question 3

A marine biologist is conducting research on animals that have a lophophore and two calcified shells.Based on this information,this animal must belong to the phylum

Accepted Answer

A)  Mollusca.
B)  Phoronida.
C)  Ectoprocta.
D)  Bryopoda.
E)  Brachiopoda.F) C) and E)
G) B) and E) E

Question 4

The side to side thrashing of a nematode is accomplished by contraction of its circular muscles.

Accepted Answer

A) True 
 B)False

Question 5

Trochophores,the free-swimming larvae of many mollusks,are propelled through the water by

Accepted Answer

A)  flagella.
B)  cilia.
C)  flame cells.
D)  nephridia.
E)  the radula.F) B) and D)
G) All of the above

Question 6

Chelicerae function as

Accepted Answer

A)  eyes.
B)  fangs or pincers.
C)  jaws or mandibles.
D)  teeth.
E)  wings.F) A) and E)
G) C) and E)

Question 7

What is a simple way for determining if an annelid is a member of Errantia (a polychaete) or Sedentaria (a clitellate) ?

Accepted Answer

A)  The number of segments
B)  Possession of a closed circulatory system
C)  The amount of chaetae (setae) 
D)  The layout of the digestive systemE) A) and D)
F) A) and B)

Question 8

A biologist has been studying a mollusk that does not have a shell.It lives in the marine environment.Of the examples given below,which one did the biologist study?

Accepted Answer

A)  clam
B)  snail
C)  nautilus
D)  chiton
E)  octopusF) A) and C)
G) A) and B)

Question 9

The phyla Bryozoa and Brachiopoda have which feature in common?

Accepted Answer

A)  nephridia
B)  a lophophore
C)  a radula
D)  setae
E)  a muscular footF) A) and E)
G) A) and B)

Question 10

The medicinal leech,once used to withdraw "unhealthy" blood from patients,produces ________ to ensure blood flow from the host?

Accepted Answer

A)  antibiotics
B)  antibodies
C)  anticoagulants
D)  blood clots
E)  suture materialF) A) and B)
G) D) and E)

Question 11

How could a paleontologist distinguish between a bryozoan fossil and a brachiopod fossil?

Accepted Answer

A)  Bryozoans are large and solitary.
B)  Zoecia are always found in aggregates.
C)  You can only distinguish the two by examining the lophophore.
D)  Bryozoans often look like bivalves.E) A) and C)
F) A) and B) B

Question 12

Members of the class ________,which include octopuses,squids,and nautiluses,are highly intelligent.

Accepted Answer

Cephalopod...

Question 13

The sexual reproduction of earthworms characteristically is

Accepted Answer

A)  hermaphroditic but cross-fertilizing.
B)  hermaphroditic but self-fertilizing.
C)  normal type between individuals who remain as males and females throughout their lifetime.
D)  normal appearing,but individuals change sex periodically.
E)  normal appearing,but individuals reproduce only once in their lives.F) C) and D)
G) A) and E)

Question 14

Which feature is an evolutionary novelty of hexapods?

Accepted Answer

A)  Jointed appendages
B)  Mandibles
C)  Chitinous exoskeletons
D)  Wings
E)  AntennaeF) B) and C)
G) A) and C)

Question 15

In what way are a human and a crab similar?

Accepted Answer

A)  Vertebrates and arthropods are deuterostomes.
B)  Both have muscles that pull against rigid skeletons.
C)  Both have closed circulatory systems.
D)  Both have a continuous growth pattern.E) All of the above
F) B) and D)

Question 16

Which of the following organs of cephalopods resemble those of the vertebrates?

Accepted Answer

A)  arms
B)  nephridia
C)  eyes
D)  digestive tissues
E)  footF) B) and E)
G) B) and C)

Question 17

Pinworm is a nematode parasite that lives in the human rectum,and causes itching in the anal area.What best explains the itching symptom?

Accepted Answer

A)  Any kind of parasite will naturally irritate the skin.
B)  The itching induces the person to scratch,helping to spread the parasite to another person.
C)  The itching is a side-effect when the immune system has successfully attacked the nematode.
D)  The itching is because of the mismatch between humans and the parasite's natural host.E) None of the above
F) All of the above

Question 18

The molluscan class ________ includes the snails and slugs.

Accepted Answer

Gastropoda...

Question 19

The excretory structures of terrestrial arthropods are slender projections from the digestive tract that are attached at the junction of the midgut and hindgut.These are called

Accepted Answer

A)  flame cells.
B)  kidneys and bladders.
C)  Malpighian tubules.
D)  nephridia.
E)  ocelli.F) A) and D)
G) C) and D)

Question 20

What would result if a leech had a mutation causing it to secrete low levels of anticoagulants?

Accepted Answer

A)  The pain of the leech bite would cause the leech to be detected.
B)  The leech would have a hard time locating appropriate hosts.
C)  The blood would stop flowing after a short time.
D)  The leech would have a hard time remaining attached to its host.E) B) and C)
F) None of the above

Exam 33: Protostomes

An entomologist observed a locust sitting on a branch pumping its abdomen like an accordion.What is the insect most likely doing?

Correct AnswerverifiedShow Answer

Scorpions have a prosoma,pedipalps that are modified into claws,and chelicerae.Which taxonomic group are they a member of?

Correct AnswerverifiedA

A marine biologist is conducting research on animals that have a lophophore and two calcified shells.Based on this information,this animal must belong to the phylum

Correct AnswerverifiedE

The side to side thrashing of a nematode is accomplished by contraction of its circular muscles.

Correct AnswerverifiedShow Answer

Trochophores,the free-swimming larvae of many mollusks,are propelled through the water by

Correct AnswerverifiedShow Answer

Chelicerae function as

Correct AnswerverifiedShow Answer

What is a simple way for determining if an annelid is a member of Errantia (a polychaete) or Sedentaria (a clitellate) ?

Correct AnswerverifiedShow Answer

A biologist has been studying a mollusk that does not have a shell.It lives in the marine environment.Of the examples given below,which one did the biologist study?

Correct AnswerverifiedShow Answer

The phyla Bryozoa and Brachiopoda have which feature in common?

Correct AnswerverifiedShow Answer

The medicinal leech,once used to withdraw "unhealthy" blood from patients,produces ________ to ensure blood flow from the host?

Correct AnswerverifiedShow Answer

How could a paleontologist distinguish between a bryozoan fossil and a brachiopod fossil?

Correct AnswerverifiedB

Members of the class ________,which include octopuses,squids,and nautiluses,are highly intelligent.

Correct AnswerverifiedCephalopod...View AnswerShow Answer

The sexual reproduction of earthworms characteristically is

Correct AnswerverifiedShow Answer

Which feature is an evolutionary novelty of hexapods?

Correct AnswerverifiedShow Answer

In what way are a human and a crab similar?

Correct AnswerverifiedShow Answer

Which of the following organs of cephalopods resemble those of the vertebrates?

Correct AnswerverifiedShow Answer

Pinworm is a nematode parasite that lives in the human rectum,and causes itching in the anal area.What best explains the itching symptom?

Correct AnswerverifiedShow Answer

The molluscan class ________ includes the snails and slugs.

Correct AnswerverifiedGastropoda...View AnswerShow Answer

The excretory structures of terrestrial arthropods are slender projections from the digestive tract that are attached at the junction of the midgut and hindgut.These are called

Correct AnswerverifiedShow Answer

What would result if a leech had a mutation causing it to secrete low levels of anticoagulants?

Correct AnswerverifiedShow Answer

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A

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E

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B

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Cephalopod...
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Gastropoda...
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