Question 1

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

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) Myriapoda 
A) Chelicerata 
B) Hexapoda 
C) Crustacea 
D) Myriapoda A

Question 3

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. 
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. B

Question 4

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

Accepted Answer

Cephalopod

Question 5

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 pedipalps 
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 pedipalps

Question 6

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. 
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.

Question 7

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

Accepted Answer

A) True 
 B)False

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) octopus 
A) clam 
B) snail 
C) nautilus 
D) chiton 
E) octopus

Question 9

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 material 
A) antibiotics 
B) antibodies 
C) anticoagulants 
D) blood clots 
E) suture material

Question 10

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

Question 11

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 foot 
A) nephridia 
B) a lophophore 
C) a radula 
D) setae 
E) a muscular foot

Question 12

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. 
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.

Question 13

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. 
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.

Question 14

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. 
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.

Question 15

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. 
A) flagella. 
B) cilia. 
C) flame cells. 
D) nephridia. 
E) the radula.

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) foot 
A) arms 
B) nephridia 
C) eyes 
D) digestive tissues 
E) foot

Question 17

Chelicerae function as

Accepted Answer

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

Question 18

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

Question 19

Which feature is an evolutionary novelty of hexapods?

Accepted Answer

A) Jointed appendages 
B) Mandibles 
C) Chitinous exoskeletons 
D) Wings 
E) Antennae 
A) Jointed appendages 
B) Mandibles 
C) Chitinous exoskeletons 
D) Wings 
E) Antennae

Question 20

The molluscan class ________ includes the snails and slugs.

Accepted Answer

Gastropoda

Exam 33: Protostomes

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

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

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

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

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

The sexual reproduction of earthworms characteristically is

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

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?

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

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

The phyla Bryozoa and Brachiopoda have which feature in common?

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

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

In what way are a human and a crab similar?

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

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

Chelicerae function as

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

Which feature is an evolutionary novelty of hexapods?

The molluscan class ________ includes the snails and slugs.

The Science of Biology

The Nature of Molecules and the Properties of Water

The Chemical Building Blocks of Life

Cell Structure

Membranes

Energy and Metabolism

How Cells Harvest Energy

Photosynthesis

Cell Communication

How Cells Divide

Sexual Reproduction and Meiosis

Patterns of Inheritance

Chromosomes, mapping, and the Meiosisinheritance Connection

Dna: the Genetic Material

Genes and How They Work

Control of Gene Expression

Biotechnology

Genomics

Cellular Mechanisms of Development

Genes Within Populations

The Evidence for Evolution

The Origin of Species

Systematics,phylogenies,and Comparative Biology

Genome Evolution

The Origin and Diversity of Life

Viruses

Prokaryotes

Protists

Seedless Plants

Seed Plants

Fungi

Animal Diversity and the Evolution of Body Plans

Deuterostomes

Plant Form

Transport in Plants

Plant Nutrition and Soils

Plant Defense Responses

Sensory Systems in Plants

Plant Reproduction

The Animal Body and Principles of Regulation

The Nervous System

Sensory Systems

The Endocrine System

The Musculoskeletal System

The Digestive System

The Respiratory System

The Circulatory System

Osmotic Regulation and the Urinary System

The Immune System

The Reproductive System

Animal Development

Behavioral Biology

Ecology of Individuals and Populations

Community Ecology

Dynamics of Ecosystems

The Biosphere and Human Impacts

Conservation Biology

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