Question 1

Many of which of the following annelid classes are parasites?

Accepted Answer

A) Oligochaeta 
B) Polychaeta 
C) Hirudinea (leeches) 
D) all three of these 
E) two of these 
A) Oligochaeta 
B) Polychaeta 
C) Hirudinea (leeches) 
D) all three of these 
E) two of these

Question 2

Which two main clades branch from the most recent common ancestor of the eumetazoans?

Accepted Answer

A) Calcarea and Silicea 
B) Lophotrochozoa and Ecdysozoa 
C) Cnidaria and Bilateria 
D) Rotifera and Deuterostomia 
E) Deuterostomia and Bilateria 
A) Calcarea and Silicea 
B) Lophotrochozoa and Ecdysozoa 
C) Cnidaria and Bilateria 
D) Rotifera and Deuterostomia 
E) Deuterostomia and Bilateria

Question 3

Which of the following is found only among annelids?

Accepted Answer

A) a hydrostatic skeleton 
B) segmentation 
C) a clitellum 
D) a closed circulatory system 
E) a cuticle made of chitin 
A) a hydrostatic skeleton 
B) segmentation 
C) a clitellum 
D) a closed circulatory system 
E) a cuticle made of chitin

Question 4

The following questions refer to the paragraph below.
An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates-a parrotfish and a clownfish-were added. She arranged for daily feedings of copepods and feeder fish.
-If the teacher had used a dissecting microscope to examine the outer surfaces of the empty bivalve shells, the teacher would probably have seen marks that had been left by

Accepted Answer

A) jaws. 
B) nematocysts. 
C) tube feet. 
D) a lophophore. 
E) a madreporite. 
A) jaws. 
B) nematocysts. 
C) tube feet. 
D) a lophophore. 
E) a madreporite.

Question 5

The following questions refer to the paragraph below.
An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates-a parrotfish and a clownfish-were added. She arranged for daily feedings of copepods and feeder fish.
-The bivalves started to die one by one; only the undamaged shells remained. To keep the remaining bilvalves alive, the teacher would have had to remove the

Accepted Answer

A) sea anemones. 
B) sea star. 
C) gastropods. 
D) ectoprocts. 
E) parrotfish. 
A) sea anemones. 
B) sea star. 
C) gastropods. 
D) ectoprocts. 
E) parrotfish.

Question 6

Which class of the phylum Cnidaria includes "jellies" with rounded (as opposed to boxlike)medusae?

Accepted Answer

A) Hydrozoa 
B) Scyphozoa 
C) Anthozoa 
D) Cubozoa 
E) Both A and C are referred to as "jellies." 
A) Hydrozoa 
B) Scyphozoa 
C) Anthozoa 
D) Cubozoa 
E) Both A and C are referred to as "jellies."

Question 7

Which of the following are characteristics of arthropods?
1) protostome development
2) bilateral symmetry
3) a pseudocoelom
4) three embryonic germ layers
5) a closed circulatory system

Accepted Answer

A) 1 and 2 
B) 2 and 3 
C) 1, 2, and 4 
D) 2, 3, and 5 
E) 3, 4, and 5 
A) 1 and 2 
B) 2 and 3 
C) 1, 2, and 4 
D) 2, 3, and 5 
E) 3, 4, and 5

Question 8

The following questions refer to the paragraph below.
A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly "jet" through the water. Watching further, she is able to conclude that the "mystery organisms" are ambush predators, and their prey includes everything from insects to small fish and tadpoles.
-Protostomes with a unique drape of tissue that may secrete a shell are part of which phylum?

Accepted Answer

A) Cnidaria 
B) Annelida 
C) Mollusca 
D) Arthropoda 
E) Echinodermata 
A) Cnidaria 
B) Annelida 
C) Mollusca 
D) Arthropoda 
E) Echinodermata

Question 9

A shared derived characteristic for members of the arthropod subgroup that includes spiders would be the presence of

Accepted Answer

A) chelicerae. 
B) an open circulatory system. 
C) an exoskeleton. 
D) a cuticle. 
E) a cephalothorax. 
A) chelicerae. 
B) an open circulatory system. 
C) an exoskeleton. 
D) a cuticle. 
E) a cephalothorax.

Question 10

While snorkeling, a student observes an active marine animal that has a series of muscular tentacles bearing suckers associated with its head. Segmentation is not observed, but a pair of large, well-developed eyes is evident. The student is observing an animal belonging to which class?

Accepted Answer

A) chitons 
B) bivalves 
C) gastropods 
D) cephalopods 
A) chitons 
B) bivalves 
C) gastropods 
D) cephalopods

Question 11

The following questions refer to the paragraph below.
An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates-a parrotfish and a clownfish-were added. She arranged for daily feedings of copepods and feeder fish.
-One day, little Tommy (a student in an under-supervised class of 40 fifth graders)got the urge to pet Nemo (the clownfish)who was swimming among the waving petals of a pretty underwater "flower" that had a big hole in the midst of the petals. Tommy giggled upon finding that these petals were sticky feeling. A few hours later, Tommy was in the nurse's office with nausea and cramps. Microscopic examination of his fingers would probably have revealed the presence of

Accepted Answer

A) teeth marks. 
B) spines. 
C) spicules. 
D) nematocysts. 
E) a radula. 
A) teeth marks. 
B) spines. 
C) spicules. 
D) nematocysts. 
E) a radula.

Question 12

A terrestrial mollusc without a shell belongs to which class?

Accepted Answer

A) chitons 
B) bivalves 
C) gastropods 
D) cephalopods 
A) chitons 
B) bivalves 
C) gastropods 
D) cephalopods

Question 13

Figure 33.1
-Which of these factors, when used to label the horizontal axis of the graph in Figure 33.1, would account most directly for the shape of the plot?

Accepted Answer

A) spongin concentration (gm/unit volume) 
B) rate of cribrostatin synthesis (molecules/unit time) 
C) number of pores per sponge 
D) number of spicules per sponge 
E) number of choanocytes per sponge 
A) spongin concentration (gm/unit volume) 
B) rate of cribrostatin synthesis (molecules/unit time) 
C) number of pores per sponge 
D) number of spicules per sponge 
E) number of choanocytes per sponge

Question 14

The following questions refer to the paragraph below.
A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly "jet" through the water. Watching further, she is able to conclude that the "mystery organisms" are ambush predators, and their prey includes everything from insects to small fish and tadpoles.
-Sarah noticed the presence of many empty exoskeletons attached to emergent vegetation. These exoskeletons looked exactly like those of the largest of the "mystery organisms" she had seen in the pond. They also looked similar to the bodies of the dragonflies that patrolled the surface of the pond. If Sarah had learned a lot from her college biology class, what should she have concluded about the mysterious pond organisms?

Accepted Answer

A) They are larval dragonflies, destined to undergo incomplete metamorphosis. 
B) They are larval dragonflies, destined to undergo complete metamorphosis. 
C) They are adult dragonflies, so old that they can no longer fly, have fallen into the pond, but have not yet drowned. 
D) They are adult dragonflies that must, like many amphibian species, return to water in order to mate. 
A) They are larval dragonflies, destined to undergo incomplete metamorphosis. 
B) They are larval dragonflies, destined to undergo complete metamorphosis. 
C) They are adult dragonflies, so old that they can no longer fly, have fallen into the pond, but have not yet drowned. 
D) They are adult dragonflies that must, like many amphibian species, return to water in order to mate.

Question 15

Which of the following is True of members of the phylum Cnidaria?

Accepted Answer

A) They are not capable of locomotion because they lack True muscle tissue. 
B) They are primarily filter feeders. 
C) They have either or both of two body forms: mobile polyps and sessile medusae. 
D) They may use a gastrovascular cavity as a hydrostatic skeleton. 
E) They are the simplest organisms with a complete alimentary canal (two openings). 
A) They are not capable of locomotion because they lack True muscle tissue. 
B) They are primarily filter feeders. 
C) They have either or both of two body forms: mobile polyps and sessile medusae. 
D) They may use a gastrovascular cavity as a hydrostatic skeleton. 
E) They are the simplest organisms with a complete alimentary canal (two openings).

Question 16

Which of the following is correctly associated with sponges?

Accepted Answer

A) osculum 
B) body cavity 
C) cnidocytes 
D) spicules made of chitin 
E) muscle cells and nerve cells 
A) osculum 
B) body cavity 
C) cnidocytes 
D) spicules made of chitin 
E) muscle cells and nerve cells

Question 17

The heartworms that can accumulate within the hearts of dogs and other mammals have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally shed. To which phylum does the heartworm belong?

Accepted Answer

A) Platyhelminthes 
B) Arthropoda 
C) Nematoda 
D) Acoela 
E) Annelida 
A) Platyhelminthes 
B) Arthropoda 
C) Nematoda 
D) Acoela 
E) Annelida

Question 18

If a lung were to be found in a mollusc, where would it be located?

Accepted Answer

A) mantle cavity 
B) coelom 
C) foot 
D) visceral mass 
E) excurrent siphon 
A) mantle cavity 
B) coelom 
C) foot 
D) visceral mass 
E) excurrent siphon

Question 19

The following questions refer to the paragraph below.
An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates-a parrotfish and a clownfish-were added. She arranged for daily feedings of copepods and feeder fish.
-The clownfish and parrotfish died on the same day. Autopsies revealed the presence of many small, flat worms using tiny suckers to attach to the fish gills. Most likely, these worms were members of which phylum, and which class?

Accepted Answer

A) Annelida, Hirudinea 
B) Annelida, Polychaetae 
C) Platyhelminthes, Cestoda 
D) Platyhelminthes, Monogenea 
E) Platyhelminthes, Turbellaria 
A) Annelida, Hirudinea 
B) Annelida, Polychaetae 
C) Platyhelminthes, Cestoda 
D) Platyhelminthes, Monogenea 
E) Platyhelminthes, Turbellaria

Question 20

Which of the following are entirely, or partly, composed of calcium carbonate?

Accepted Answer

A) spicules of siliceous sponges 
B) coral animals' exoskeletons 
C) molluscs' mantles 
D) insects' cuticles 
E) nematodes' cuticles 
A) spicules of siliceous sponges 
B) coral animals' exoskeletons 
C) molluscs' mantles 
D) insects' cuticles 
E) nematodes' cuticles

Exam 33: Invertebrates

Many of which of the following annelid classes are parasites?

Which two main clades branch from the most recent common ancestor of the eumetazoans?

Which of the following is found only among annelids?

Which class of the phylum Cnidaria includes "jellies" with rounded (as opposed to boxlike)medusae?

Which of the following are characteristics of arthropods? 1) protostome development 2) bilateral symmetry 3) a pseudocoelom 4) three embryonic germ layers 5) a closed circulatory system

A shared derived characteristic for members of the arthropod subgroup that includes spiders would be the presence of

While snorkeling, a student observes an active marine animal that has a series of muscular tentacles bearing suckers associated with its head. Segmentation is not observed, but a pair of large, well-developed eyes is evident. The student is observing an animal belonging to which class?

A terrestrial mollusc without a shell belongs to which class?

Figure 33.1 -Which of these factors, when used to label the horizontal axis of the graph in Figure 33.1, would account most directly for the shape of the plot?

Which of the following is True of members of the phylum Cnidaria?

Which of the following is correctly associated with sponges?

The heartworms that can accumulate within the hearts of dogs and other mammals have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally shed. To which phylum does the heartworm belong?

If a lung were to be found in a mollusc, where would it be located?

Which of the following are entirely, or partly, composed of calcium carbonate?

Introduction: Themes in the Study of Life

The Chemical Context of Life

Water and the Fitness of the Environment

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Control of Gene Expression

Viruses

Biotechnology

Genomes and Their Evolution

Descent With Modification: a Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity Ii: the Evolution of Seed Plants

Fungi

An Introduction to Animal Diversity

Vertebrates

Plant Structure, Growth, and Development

Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems

Conservation Biology and Restoration Ecology

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