Question 1

Although the many organisms classified as molluscs vary tremendously in appearance, they are all classified in the same phylum because they

Accepted Answer

A)   are segmented.
B)   are predators.
C)   have an external skeleton.
D)   have a mantle, visceral mass, and a foot.
E)   have shells.F) A) and D)
G) A) and C)

Question 2

Which body structure describes the freshwater hydra?

Accepted Answer

A)   a swimming medusa with mouth pointing downward
B)   a swimming medusa with mouth pointing upward
C)   a sessile medusa with mouth pointing upward
D)   a polyp with mouth pointing downward
E)   a polyp with mouth pointing upwardF) C) and D)
G) A) and B)

Question 3

In which way are crayfish and grasshoppers similar?

Accepted Answer

A)   Both have tympanum for use in mating rituals.
B)   Both have Malpighian tubules that function in the extraction of nitrogenous waste.
C)   Both have spicules and a tracheal system for respiration.
D)   Both have bodies that are composed of a cephalothorax and abdomen.
E)   Both have antennae that have a sensory function.F) A) and D)
G) All of the above

Question 4

Clams, snails, sea slugs, and octopuses belong to the phylum

Accepted Answer

A)   Annelida.
B)   Mollusca.
C)   Porifera.
D)   Platyhelminthes.
E)   Arthropoda.F) B) and C)
G) A) and E)

Question 5

Ascaris is considered to be a(n)

Accepted Answer

A)   flatworm.
B)   earthworm.
C)   roundworm.
D)   cnidarian.
E)   arthropod.F) B) and D)
G) A) and E)

Question 6

"Derm" means "skin," so the name Echinodermata literally means

Accepted Answer

A)   soft skin.
B)   hairy skin.
C)   spiny skin.
D)   skinless.
E)   three layers of skin.F) C) and D)
G) D) and E)

Question 7

Which of the following infections is associated with a flatworm?

Accepted Answer

A)   hookworm
B)   trichinosis
C)   elephantiasis
D)   tapeworm
E)   pinwormF) A) and D)
G) A) and C)

Question 8

Which of the following statements is/are correct about the roundworms?

Accepted Answer

A)   There are three layers of tissues in the body.
B)   Roundworms have a tube-within-a-tube body plan.
C)   There is an internal body cavity called a pseudocoelom.
D)   Roundworms have a smooth, unsegmented outside body wall.
E)   All the answer choices are true statements about roundworms.F) B) and C)
G) A) and E)

Question 9

Which of these is a characteristic of sponges?

Accepted Answer

A)   They are sessile filter feeders.
B)   The body wall has two cell layers.
C)   Flagellated collar cells move water.
D)   Amoeboid cells transport food and make skeletal fibers and gametes.
E)   All of the answer choices are characteristics of sponges.F) A) and C)
G) A) and E) E

Question 10

Earthworms differ from most of the marine annelids in that earthworms

Accepted Answer

A)   lack setae that marine annelids have.
B)   lack paddle-like parapodia that marine annelids have.
C)   have segments, while marine annelids do not.
D)   develop from a larval form, while marine annelids do not.
E)   have well-developed brains and sensory organs in the head region, while marine annelids do not.F) C) and E)
G) A) and D)

Question 11

Larval Trichinella worms live in the

Accepted Answer

A)   liver.
B)   lungs.
C)   lymph glands.
D)   skeletal muscle of pork.
E)   water.F) A) and E)
G) A) and D)

Question 12

Fertilization in the earthworm is accomplished by the use of the

Accepted Answer

A)   nephridia.
B)   clitellum.
C)   flame cells.
D)   trachea.
E)   typhlosole.F) C) and D)
G) A) and D)

Question 13

List the five general characteristics shared by animals.

Accepted Answer

1. Animals typically have the power of l...

Question 14

Which of the following is true about deuterostomes?

Accepted Answer

A)   Deuterostomes have two tissue layers.
B)   Cleavage is spiral.
C)   The first opening during embryonic development becomes the anus.
D)   The mesoderm arises from cells located near the embryonic blastopore.
E)   Deuterostomes include the ecdysozoa and the spiralia.F) None of the above
G) B) and C)

Question 15

The insect organ most equivalent to the human lung in function is the

Accepted Answer

A)   tracheae.
B)   midgut.
C)   crop.
D)   gizzard.
E)   Malpighian tubule.F) D) and E)
G) B) and E) A

Question 16

Which group of organisms has eyes with a lens and a retina similar to those of vertebrates?

Accepted Answer

A)   nematodes
B)   gastropods
C)   cephalopods
D)   arthropods
E)   echinodermsF) A) and B)
G) A) and C) C

Question 17

A cnidarian moves via

Accepted Answer

A)   nematocysts.
B)   secreting a slime layer.
C)   pseudopods.
D)   muscle and nerve fibers.
E)   contractile vacuoles.F) B) and C)
G) All of the above

Question 18

If you live on a river delta or coastline, you may not be able to eat the local clams because of high levels of toxins present in the water. Why?

Accepted Answer

A)   Clams seasonally produce toxic substances.
B)   Clams regularly consume poisonous red tide organisms.
C)   Most native clams have been replaced by harmful exotic species.
D)   Clams are filter-feeders and pollutants in the water become concentrated in their tissues.
E)   The toxins contained in clams cannot be detoxified in the human digestive tract.F) A) and D)
G) A) and C)

Question 19

The bristles that earthworms use to anchor themselves in the earth and pull themselves along are

Accepted Answer

A)   aortic arches.
B)   lateral ventricles.
C)   setae.
D)   parapodia.
E)   nephridia.F) A) and B)
G) A) and C)

Question 20

Earthworms possess both male and female organs on separate segments; thus, mating consists of "parallel parking" in opposite directions and cross-fertilizing. Given this, which of the following is true?

Accepted Answer

A)   This is evidence of a primitive state that is generally less efficient than separate sexes.
B)   This is primarily to allow them to self-fertilize if no other worm is in their sector of the soil.
C)   This is an advantage since they can mate with any other earthworm of the same species that they encounter.
D)   Maintaining any system not clearly male or female is disadvantageous; the earthworm is trapped in an evolutionary dead end.
E)   This demonstrates how ineffective self-fertilization is as a means of reproduction.F) A) and B)
G) B) and D)

Exam 31: Animals: the Invertebrates

Although the many organisms classified as molluscs vary tremendously in appearance, they are all classified in the same phylum because they

Correct AnswerverifiedShow Answer

Which body structure describes the freshwater hydra?

Correct AnswerverifiedShow Answer

In which way are crayfish and grasshoppers similar?

Correct AnswerverifiedShow Answer

Clams, snails, sea slugs, and octopuses belong to the phylum

Correct AnswerverifiedShow Answer

Ascaris is considered to be a(n)

Correct AnswerverifiedShow Answer

"Derm" means "skin," so the name Echinodermata literally means

Correct AnswerverifiedShow Answer

Which of the following infections is associated with a flatworm?

Correct AnswerverifiedShow Answer

Which of the following statements is/are correct about the roundworms?

Correct AnswerverifiedShow Answer

Which of these is a characteristic of sponges?

Correct AnswerverifiedE

Earthworms differ from most of the marine annelids in that earthworms

Correct AnswerverifiedShow Answer

Larval Trichinella worms live in the

Correct AnswerverifiedShow Answer

Fertilization in the earthworm is accomplished by the use of the

Correct AnswerverifiedShow Answer

List the five general characteristics shared by animals.

Correct Answerverified1. Animals typically have the power of l...View AnswerShow Answer

Which of the following is true about deuterostomes?

Correct AnswerverifiedShow Answer

The insect organ most equivalent to the human lung in function is the

Correct AnswerverifiedA

Which group of organisms has eyes with a lens and a retina similar to those of vertebrates?

Correct AnswerverifiedC

A cnidarian moves via

Correct AnswerverifiedShow Answer

If you live on a river delta or coastline, you may not be able to eat the local clams because of high levels of toxins present in the water. Why?

Correct AnswerverifiedShow Answer

The bristles that earthworms use to anchor themselves in the earth and pull themselves along are

Correct AnswerverifiedShow Answer

Earthworms possess both male and female organs on separate segments; thus, mating consists of "parallel parking" in opposite directions and cross-fertilizing. Given this, which of the following is true?

Correct AnswerverifiedShow Answer

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E

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1. Animals typically have the power of l...
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A

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C

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