Question 1

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) None of the above
F) All of the above

Question 2

The rigid chitinous exoskeleton of an arthropod has all of the following functions except it

Accepted Answer

A)  provides a place for muscle attachment.
B)  protects the animal from predators.
C)  impedes water loss.
D)  maintains a uniform size for all individuals of that species.E) A) and B)
F) C) and D)

Question 3

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) A) and B)

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

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 platesE) B) and C)
F) A) and D)

Question 6

Spiders and certain other arthropods which lack jaws or mandibles are placed in a subphylum called

Accepted Answer

A)  Agnathae.
B)  Amandibulata.
C)  blood suckers.
D)  chelicerates.E) C) and D)
F) B) and D)

Question 7

Eyes with single lenses that respond to light and darkness are found in many arthropods; these are the

Accepted Answer

A)  compound eyes.
B)  ocelli.
C)  apposition eyes.
D)  ommatidia.E) B) and D)
F) B) and C)

Question 8

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) A) and C)
F) A) and B)

Question 9

The organ that is responsible for secreting cocoons in the oligochaetes is known as the

Accepted Answer

A)  nephridia.
B)  setae.
C)  radula.
D)  clitellum.E) None of the above
F) A) and B)

Question 10

A marine biologist visits your biology class and begins his talk entitled, "Life as a Trochophore." A friend seated next to you asks, "What is a trochophore?" You explain that a trochophore is

Accepted Answer

A)  another name for the veliger stage in earthworm reproduction.
B)  a term used to describe a larval form of either the phylum Mollusca or Annelida.
C)  another name for the veliger stage in the oyster.
D)  similar to a lophophore, but only found in the phylum Annelida.E) None of the above
F) All of the above

Question 11

You and your biology lab class take a field trip to a marine aquarium.Your guide is a marine biologist who studies squids.She explains to your class how squids are able to blend into their environment.She points out that squids have pouches of pigments embedded in their epithelium.The pouches are called

Accepted Answer

A)  trochophores.
B)  spermatophores.
C)  lophophores.
D)  chromatophores.E) None of the above
F) B) and C)

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 systemE) None of the above
F) B) and C)

Question 13

According to the modern classification scheme, which animal would be a spider's closest relative?

Accepted Answer

A)  A snail
B)  An earthworm
C)  A tapeworm
D)  A roundwormE) All of the above
F) A) and C)

Question 14

Inside its beak an octopus has a rasping tongue that is used to tear apart food.Which gastropod structure is this analogous to?

Accepted Answer

A)  Mantle
B)  Shell
C)  Radula
D)  NephridiumE) None of the above
F) A) and B)

Question 15

In mollusks, the folds of tissue that arise from the dorsal body wall and enclose a cavity surrounding the visceral mass are called the

Accepted Answer

A)  foot.
B)  mantle.
C)  nephridia.
D)  radula.E) B) and C)
F) A) and B)

Question 16

The nitrogenous waste in mollusks is removed by

Accepted Answer

A)  flame cells.
B)  nephridia.
C)  Malpighian tubules.
D)  incurrent siphon.E) B) and C)
F) A) and B)

Question 17

Interoctopus communication is facilitated by

Accepted Answer

A)  a radula.
B)  mantle connections.
C)  chromatophores.
D)  chemical pheromones.E) C) and D)
F) B) and C)

Question 18

The cephalopod mollusks have

Accepted Answer

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

Question 19

All of the following are either structures or characteristics of members of the Class Bivalvia of the Phylum Mollusca except

Accepted Answer

A)  the mantle.
B)  a radula.
C)  a shell.
D)  gills.E) B) and C)
F) C) and D)

Question 20

The molluscan class ________ includes the snails and slugs.

Accepted Answer

Gastropoda...

Exam 34: Protostomes

Correct Answer
verified

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

Correct Answer
verified

The rigid chitinous exoskeleton of an arthropod has all of the following functions except it

Correct Answer
verified

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

Correct Answer
verified

The molluscan class ________ includes the snails and slugs.

Correct Answer
verified
Gastropoda...
View Answer

Interoctopus communication is facilitated by

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

In mollusks, the folds of tissue that arise from the dorsal body wall and enclose a cavity surrounding the visceral mass are called the

Correct Answer
verified

All of the following are either structures or characteristics of members of the Class Bivalvia of the Phylum Mollusca except

Correct Answer
verified

Inside its beak an octopus has a rasping tongue that is used to tear apart food.Which gastropod structure is this analogous to?

Correct Answer
verified

The organ that is responsible for secreting cocoons in the oligochaetes is known as the

Correct Answer
verified

The cephalopod mollusks have

Correct Answer
verified

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 Answer
verified

According to the modern classification scheme, which animal would be a spider's closest relative?

Correct Answer
verified

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

Correct Answer
verified

A marine biologist visits your biology class and begins his talk entitled, "Life as a Trochophore." A friend seated next to you asks, "What is a trochophore?" You explain that a trochophore is

Correct Answer
verified

Eyes with single lenses that respond to light and darkness are found in many arthropods; these are the

Correct Answer
verified

The nitrogenous waste in mollusks is removed by

Correct Answer
verified

Spiders and certain other arthropods which lack jaws or mandibles are placed in a subphylum called

Correct Answer
verified

Exam 34: Protostomes

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The rigid chitinous exoskeleton of an arthropod has all of the following functions except it

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The molluscan class ________ includes the snails and slugs.

Correct AnswerverifiedGastropoda...View AnswerShow Answer

Interoctopus communication is facilitated by

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In mollusks, the folds of tissue that arise from the dorsal body wall and enclose a cavity surrounding the visceral mass are called the

Correct AnswerverifiedShow Answer

All of the following are either structures or characteristics of members of the Class Bivalvia of the Phylum Mollusca except

Correct AnswerverifiedShow Answer

Inside its beak an octopus has a rasping tongue that is used to tear apart food.Which gastropod structure is this analogous to?

Correct AnswerverifiedShow Answer

The organ that is responsible for secreting cocoons in the oligochaetes is known as the

Correct AnswerverifiedShow Answer

The cephalopod mollusks have

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

According to the modern classification scheme, which animal would be a spider's closest relative?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A marine biologist visits your biology class and begins his talk entitled, "Life as a Trochophore." A friend seated next to you asks, "What is a trochophore?" You explain that a trochophore is

Correct AnswerverifiedShow Answer

Eyes with single lenses that respond to light and darkness are found in many arthropods; these are the

Correct AnswerverifiedShow Answer

The nitrogenous waste in mollusks is removed by

Correct AnswerverifiedShow Answer

Spiders and certain other arthropods which lack jaws or mandibles are placed in a subphylum called

Correct AnswerverifiedShow Answer

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verified

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Gastropoda...
View Answer

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