Question 1

Which of the following is not a class of the phylum Platyhelminthes?

Accepted Answer

A) Cestoda 
B) Trematoda 
C) Nemertea 
D) Turbellaria 
E) Monogenea 
A) Cestoda 
B) Trematoda 
C) Nemertea 
D) Turbellaria 
E) Monogenea C

Question 2

Minute,wormlike animals that live as parasites in invertebrates and have two cell layers are the _________________.

Accepted Answer

mesozoans

Question 3

Turbellarians have light-sensitive organs called _______________ or eyespots.

Accepted Answer

ocelli

Question 4

Rotifers are _____

Accepted Answer

A) primarily marine. 
B) dioecious. 
C) animals with a complete digestive tract. 
D) animals that can survive if their aquatic environment dries up. 
A) primarily marine. 
B) dioecious. 
C) animals with a complete digestive tract. 
D) animals that can survive if their aquatic environment dries up.

Question 5

The free-swimming,ciliated stage that hatches from a digenetic trematode egg is the _____________.

Accepted Answer

The answer of The free-swimming,ciliated stage that hatches from a...

Question 6

Animals with three well-defined germ layers and that have one solid mass of tissue rather than tissues and organs nestled inside a body cavity are

Accepted Answer

A) acoelomate and triploblastic. 
B) eucoelomate and diploblastic. 
C) pseudocoelomate and triploblastic. 
D) quasicoelomate and diploblastic. 
E) coelomate and triploblastic. 
A) acoelomate and triploblastic. 
B) eucoelomate and diploblastic. 
C) pseudocoelomate and triploblastic. 
D) quasicoelomate and diploblastic. 
E) coelomate and triploblastic.

Question 7

Ribbon worms do not regurgitate undigested wastes because their gut ends in an _____________.

Accepted Answer

The answer of Ribbon worms do not regurgitate undigested wastes...

Question 8

A planarian feeds by

Accepted Answer

A) attaching with a sucker and extracting blood. 
B) scraping and sucking food particles via a midventral proboscis. 
C) engulfing food particles through an anterior mouth and excreting waste via an anus. 
D) soaking all nutrients from the environment through its thin epidermal surface. 
E) sucking nutrients from the environment through its flame cell system. 
A) attaching with a sucker and extracting blood. 
B) scraping and sucking food particles via a midventral proboscis. 
C) engulfing food particles through an anterior mouth and excreting waste via an anus. 
D) soaking all nutrients from the environment through its thin epidermal surface. 
E) sucking nutrients from the environment through its flame cell system.

Question 9

Since flatworms and ribbon worms lack a coelom or a pseudocoel,they are termed _____________ animals.

Accepted Answer

The answer of Since flatworms and ribbon worms lack a...

Question 10

Because some turbellarians fail to add yolk to the egg cells as they undergo oogenesis,yolk cells surround the zygote to provide nourishment.This development is referred to as

Accepted Answer

A) endolecithal. 
B) ectolecithal. 
C) syncytial. 
D) oncospherical. 
E) hydatid. 
A) endolecithal. 
B) ectolecithal. 
C) syncytial. 
D) oncospherical. 
E) hydatid.

Question 11

The flatworms typically have _______ cleavage.

Accepted Answer

A) Radial 
B) Bilateral 
C) Rotational 
D) Discoidal 
E) Spiral 
A) Radial 
B) Bilateral 
C) Rotational 
D) Discoidal 
E) Spiral

Question 12

"Amictic" eggs would

Accepted Answer

A) be fertile but not develop. 
B) be diploid and develop without fertilization. 
C) be haploid and only develop if fertilized. 
D) lack yolk. 
A) be fertile but not develop. 
B) be diploid and develop without fertilization. 
C) be haploid and only develop if fertilized. 
D) lack yolk.

Question 13

The monogenetic flukes

Accepted Answer

A) are mostly ectoparasites. 
B) are usually found in rabbits. 
C) require an intermediate and a definitive host. 
D) All of the choices are correct 
E) None of the choices is correct 
A) are mostly ectoparasites. 
B) are usually found in rabbits. 
C) require an intermediate and a definitive host. 
D) All of the choices are correct 
E) None of the choices is correct

Question 14

Which of the following statements is NOT correct?

Accepted Answer

A) Planaria lack a unique larval stage 
B) Planaria ingest food through a mouth located in the anterior region 
C) Flukes have two suckers by which they attach to host tissues 
D) Tapeworms have a scolex with hooks and suckers,by which they attach to the host's intestinal tissues 
E) Tapeworms can enter the human body through undercooked meat,especially pork,which contains encysted larval forms 
A) Planaria lack a unique larval stage 
B) Planaria ingest food through a mouth located in the anterior region 
C) Flukes have two suckers by which they attach to host tissues 
D) Tapeworms have a scolex with hooks and suckers,by which they attach to the host's intestinal tissues 
E) Tapeworms can enter the human body through undercooked meat,especially pork,which contains encysted larval forms

Question 15

The correct sequence of development in a typical fluke life cycle is

Accepted Answer

A) egg,miracidium,cercaria,sporocyst. 
B) egg,miracidium,sporocyst,cercaria. 
C) egg,sporocyst,cercaria,miracidium. 
D) egg,cercaria,miracidium,sporocyst. 
E) egg,sporocyst,miracidium,cercaria. 
A) egg,miracidium,cercaria,sporocyst. 
B) egg,miracidium,sporocyst,cercaria. 
C) egg,sporocyst,cercaria,miracidium. 
D) egg,cercaria,miracidium,sporocyst. 
E) egg,sporocyst,miracidium,cercaria.

Question 16

Taenia solium is a dangerous tapeworm because humans can serve as its ______________ host.

Accepted Answer

The answer of Taenia solium is a dangerous tapeworm because...

Question 17

Acanthocephalans

Accepted Answer

A) parasitize birds and mammals. 
B) are monoecious. 
C) have a well developed digestive tract. 
D) are found in the host's liver. 
A) parasitize birds and mammals. 
B) are monoecious. 
C) have a well developed digestive tract. 
D) are found in the host's liver.

Question 18

Some rotifers have a thick case-like layer arranged in plates or rings called a _____.

Accepted Answer

A) mastix 
B) trochal 
C) lorica 
D) trophi 
A) mastix 
B) trochal 
C) lorica 
D) trophi

Question 19

Tissues that seem to violate the cell theory because the nuclei are not separated by cell membranes are

Accepted Answer

A) parenchymal. 
B) syncytial. 
C) tegumental. 
D) rhabdites. 
E) vitellaria. 
A) parenchymal. 
B) syncytial. 
C) tegumental. 
D) rhabdites. 
E) vitellaria.

Question 20

The posterior attachment organ of monogeneans is the ________________.

Accepted Answer

The answer of The posterior attachment organ of monogeneans is...

Exam 14: Acoelomorpha, Platyzoa, and Mesozoa

Which of the following is not a class of the phylum Platyhelminthes?

Minute,wormlike animals that live as parasites in invertebrates and have two cell layers are the _________________.

Turbellarians have light-sensitive organs called _______________ or eyespots.

Rotifers are _____

The free-swimming,ciliated stage that hatches from a digenetic trematode egg is the _____________.

Animals with three well-defined germ layers and that have one solid mass of tissue rather than tissues and organs nestled inside a body cavity are

Ribbon worms do not regurgitate undigested wastes because their gut ends in an _____________.

A planarian feeds by

Since flatworms and ribbon worms lack a coelom or a pseudocoel,they are termed _____________ animals.

Because some turbellarians fail to add yolk to the egg cells as they undergo oogenesis,yolk cells surround the zygote to provide nourishment.This development is referred to as

The flatworms typically have _______ cleavage.

"Amictic" eggs would

The monogenetic flukes

Which of the following statements is NOT correct?

The correct sequence of development in a typical fluke life cycle is

Taenia solium is a dangerous tapeworm because humans can serve as its ______________ host.

Acanthocephalans

Some rotifers have a thick case-like layer arranged in plates or rings called a _____.

Tissues that seem to violate the cell theory because the nuclei are not separated by cell membranes are

The posterior attachment organ of monogeneans is the ________________.

Life: Biological Principles and the Science of Zoology

The Origin and Chemistry of Life

Cells As Units of Life

Cellular Metabolism

Genetics: a Review

Organic Evolution

The Reproductive Process

Principles of Development

Architectual Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Cnidarians and Ctenophores

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Hexapods

Chaetognaths, echinoderms, and Hemichordates

Chordates

Fishes

Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Support, Protection, and Movement

Homeostasis: Osmotic Regulation, Excretion, and Temperature Regulation

Homeostasis: Internal Fluids and Respiration

Digestion and Nutrition

Nervous Coordination: Nervous System and Sense Organs

Chemical Coordination: Endocrine System

Immunity

Animal Behavior

Animal Distribution

Animal Ecology

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