Question 1

The evolution of jointed appendages has made ________ very successful.

Accepted Answer

Arthropods...

Question 2

An invertebrate biologist is conducting research with crabs.Her interest is ecdysis.This implies that she studies

Accepted Answer

A)  tagmatization processes in crustaceans.
B)  how ommatidia function individually in a compound eye.
C)  how the HOX gene controls the fusion of the head and thorax into the cephalothorax.
D)  how ocelli evolved from mere photoreceptors to imaging lens.
E)  the molting process.F) B) and C)
G) None of the above

Question 3

Humans have direct development,a closed circulatory system,well-developed eyes,and large brains.Which mollusk also shares these features?

Accepted Answer

A)  Chiton
B)  Slug
C)  Octopus
D)  NudibranchE) All of the above
F) C) and D)

Question 4

Why doesn't a tapeworm have a mouth on its scolex?

Accepted Answer

A)  The mouth is on the proglottids.
B)  Endoparasites don't need a mouth.
C)  The mouth is located at the end of the pharynx.
D)  Tapeworms use a radula instead of a mouth to feed.E) A) and B)
F) All of the above

Question 5

The rasping tongue,the radula,is present in which molluscan group?

Accepted Answer

A)  bivalve
B)  oyster
C)  clam
D)  snail
E)  scallopsF) A) and E)
G) A) and D)

Question 6

Paramecia use cilia for locomotion and for gathering organic matter.How are rotifers similar?

Accepted Answer

A)  Rotifers are single-celled protists.
B)  The corona is made of cilia,and used for swimming and feeding.
C)  Rotifers and ciliates are thought to have given rise to all other animal phyla.
D)  Both lack a gut.E) A) and B)
F) A) and C)

Question 7

Many marine mollusks have distinctive larvae which have their bodies encircled by a row of cilia.These larvae are called

Accepted Answer

A)  planulae.
B)  polyps.
C)  miracidia.
D)  zoecia.
E)  trochophores.F) B) and E)
G) A) and E)

Question 8

Which one of the following incorrectly matches a molluscan group with a feature characterizing that group?

Accepted Answer

A)  Gastropoda-torsion
B)  Nudibranchs-extensive gills in mantle cavity
C)  Bivalvia-reduced head and no radula
D)  Polyplacophora-eight calcareous plates
E)  Cephalopoda-closed circulatory systemF) A) and D)
G) B) and D)

Question 9

In terms of the number of species,the most successful class of arthropods is

Accepted Answer

A)  Hexapoda.
B)  Chelicerata.
C)  Crustacea.
D)  Chilopoda.
E)  Myriapoda.F) None of the above
G) A) and D)

Question 10

Compound eyes are composed of independent visual units called

Accepted Answer

A)  apposition segments.
B)  ocelli.
C)  ommatidia.
D)  retinas.
E)  simple eyes.F) None of the above
G) A) and B)

Question 11

The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of

Accepted Answer

A)  bilateral symmetry.
B)  coelomic body architecture.
C)  jointed appendages.
D)  segmentation.
E)  three primary types of tissues.F) C) and D)
G) B) and E)

Question 12

Which one of the following insect organ systems has placed the greatest limitation on their body size?

Accepted Answer

A)  nervous system
B)  digestive system
C)  respiratory system
D)  reproductive system
E)  excretory systemF) B) and D)
G) A) and D)

Question 13

A marine biologist makes a presentation about crustaceans to your biology class.He explains that he has recently received an NSF grant to study sessile crustaceans.You are only aware of one group of sessile crustaceans.This crustacean must be

Accepted Answer

A)  a lobster.
B)  a crayfish.
C)  a shrimp.
D)  a barnacle.
E)  the nauplius.F) All of the above
G) D) and E)

Question 14

Which one of the following statements about the phylum Brachiopoda is false?

Accepted Answer

A)  Brachiopods are often misidentified as bivalves.
B)  Brachiopods were much more diverse in the past.
C)  As in bivalves,the valves in brachiopods are lateral (left and right) to the body axis.
D)  Most brachiopods are sessile (attached) .
E)  The lophophore resides within the brachiopod's shells.F) B) and E)
G) None of the above

Question 15

Air passage into the trachea of most insects is controlled by the closing and opening of valves,which operate special openings called

Accepted Answer

A)  spiracles.
B)  ocelli.
C)  ommatidia.
D)  book lungs.
E)  Malpighian tubules.F) A) and B)
G) A) and C)

Question 16

The cephalopod mollusks have

Accepted Answer

A)  a muscular foot.
B)  tentacles.
C)  two siphons.
D)  setae.
E)  jointed appendages.F) A) and C)
G) A) and E)

Question 17

Earthworms show all of the following features except

Accepted Answer

A)  containing segments with a mouth on the first and the anus on the last.
B)  containing touch-sensitive and light-sensitive organs in the segments.
C)  containing fewer setae than in polychaetes.
D)  containing distinct head regions and parapodia.
E)  being hermaphroditic.F) A) and B)
G) B) and E)

Question 18

The phylum that includes snails,clams,oysters,and octopuses is the

Accepted Answer

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

Question 19

A ________ is a circular or U-shaped ridge around the mouth,bearing either one or two rows of ciliated,hollow tentacles.

Accepted Answer

Lophophore...

Exam 33: Protostomes

Humans have direct development,a closed circulatory system,well-developed eyes,and large brains.Which mollusk also shares these features?

Correct Answer
verified

Which one of the following statements about the phylum Brachiopoda is false?

Correct Answer
verified

Earthworms show all of the following features except

Correct Answer
verified

Which one of the following insect organ systems has placed the greatest limitation on their body size?

Correct Answer
verified

An invertebrate biologist is conducting research with crabs.Her interest is ecdysis.This implies that she studies

Correct Answer
verified

The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of

Correct Answer
verified

Compound eyes are composed of independent visual units called

Correct Answer
verified

Paramecia use cilia for locomotion and for gathering organic matter.How are rotifers similar?

Correct Answer
verified

The rasping tongue,the radula,is present in which molluscan group?

Correct Answer
verified

The evolution of jointed appendages has made ________ very successful.

Correct Answer
verified
Arthropods...
View Answer

The cephalopod mollusks have

Correct Answer
verified

A ________ is a circular or U-shaped ridge around the mouth,bearing either one or two rows of ciliated,hollow tentacles.

Correct Answer
verified
Lophophore...
View Answer

The phylum that includes snails,clams,oysters,and octopuses is the

Correct Answer
verified

Many marine mollusks have distinctive larvae which have their bodies encircled by a row of cilia.These larvae are called

Correct Answer
verified

A marine biologist makes a presentation about crustaceans to your biology class.He explains that he has recently received an NSF grant to study sessile crustaceans.You are only aware of one group of sessile crustaceans.This crustacean must be

Correct Answer
verified

Which one of the following incorrectly matches a molluscan group with a feature characterizing that group?

Correct Answer
verified

In terms of the number of species,the most successful class of arthropods is

Correct Answer
verified

Why doesn't a tapeworm have a mouth on its scolex?

Correct Answer
verified

Air passage into the trachea of most insects is controlled by the closing and opening of valves,which operate special openings called

Correct Answer
verified

Exam 33: Protostomes

Humans have direct development,a closed circulatory system,well-developed eyes,and large brains.Which mollusk also shares these features?

Correct AnswerverifiedShow Answer

Which one of the following statements about the phylum Brachiopoda is false?

Correct AnswerverifiedShow Answer

Earthworms show all of the following features except

Correct AnswerverifiedShow Answer

Which one of the following insect organ systems has placed the greatest limitation on their body size?

Correct AnswerverifiedShow Answer

An invertebrate biologist is conducting research with crabs.Her interest is ecdysis.This implies that she studies

Correct AnswerverifiedShow Answer

The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of

Correct AnswerverifiedShow Answer

Compound eyes are composed of independent visual units called

Correct AnswerverifiedShow Answer

Paramecia use cilia for locomotion and for gathering organic matter.How are rotifers similar?

Correct AnswerverifiedShow Answer

The rasping tongue,the radula,is present in which molluscan group?

Correct AnswerverifiedShow Answer

The evolution of jointed appendages has made ________ very successful.

Correct AnswerverifiedArthropods...View AnswerShow Answer

The cephalopod mollusks have

Correct AnswerverifiedShow Answer

A ________ is a circular or U-shaped ridge around the mouth,bearing either one or two rows of ciliated,hollow tentacles.

Correct AnswerverifiedLophophore...View AnswerShow Answer

The phylum that includes snails,clams,oysters,and octopuses is the

Correct AnswerverifiedShow Answer

Many marine mollusks have distinctive larvae which have their bodies encircled by a row of cilia.These larvae are called

Correct AnswerverifiedShow Answer

A marine biologist makes a presentation about crustaceans to your biology class.He explains that he has recently received an NSF grant to study sessile crustaceans.You are only aware of one group of sessile crustaceans.This crustacean must be

Correct AnswerverifiedShow Answer

Which one of the following incorrectly matches a molluscan group with a feature characterizing that group?

Correct AnswerverifiedShow Answer

In terms of the number of species,the most successful class of arthropods is

Correct AnswerverifiedShow Answer

Why doesn't a tapeworm have a mouth on its scolex?

Correct AnswerverifiedShow Answer

Air passage into the trachea of most insects is controlled by the closing and opening of valves,which operate special openings called

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Arthropods...
View Answer

Correct Answer
verified

Correct Answer
verified
Lophophore...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified