Question 1

Which of the following statements is correct about the flatworms?

Accepted Answer

A)  Flatworms have three complete tissue layers. 
B)  Flatworms may be either free living or parasitic. 
C)  Flatworms have a sac body plan, with only a mouth and no anus. 
D)  Most planaria are found in marine environments, but some dwell in freshwater and moist terrestrial environments. 
E)  All of the answer choices describe flatworms. 
A)  Flatworms have three complete tissue layers. 
B)  Flatworms may be either free living or parasitic. 
C)  Flatworms have a sac body plan, with only a mouth and no anus. 
D)  Most planaria are found in marine environments, but some dwell in freshwater and moist terrestrial environments. 
E)  All of the answer choices describe flatworms.

Question 2

Which of the following is characteristic of flukes?

Accepted Answer

A)  Flukes are ectoparasites of invertebrates. 
B)  Most flukes have separate sexes. 
C)  Flukes are covered by a ciliated integument. 
D)  Flukes possess an oral sucker that is surrounded by a nonsensory papilla. 
E)  Flukes have a well-developed alimentary canal. 
A)  Flukes are ectoparasites of invertebrates. 
B)  Most flukes have separate sexes. 
C)  Flukes are covered by a ciliated integument. 
D)  Flukes possess an oral sucker that is surrounded by a nonsensory papilla. 
E)  Flukes have a well-developed alimentary canal.

Question 3

Which of the following is a characteristic of all animals?

Accepted Answer

A)  They ingest food that is digested in a central cavity. 
B)  Usually undergo sexual reproduction. 
C)  They produce an embryo that undergoes development in stages. 
D)  The adult form is diploid. 
E)  All of the answer choices describe characteristics of animals. 
A)  They ingest food that is digested in a central cavity. 
B)  Usually undergo sexual reproduction. 
C)  They produce an embryo that undergoes development in stages. 
D)  The adult form is diploid. 
E)  All of the answer choices describe characteristics of animals.

Question 4

Earthworms are

Accepted Answer

A)  annelids. 
B)  molluscs. 
C)  echinoderms. 
D)  platyhelminthes. 
E)  arthropods. 
A)  annelids. 
B)  molluscs. 
C)  echinoderms. 
D)  platyhelminthes. 
E)  arthropods.

Question 5

Which of the following is a characteristic of echinoderms?

Accepted Answer

A)  radial symmetry in adults 
B)  endoskeleton of spiny, calcium-rich plates 
C)  bilateral symmetry in larva 
D)  both sexual and asexual reproduction 
E)  All of the answer choices describe characteristics of echinoderms. 
A)  radial symmetry in adults 
B)  endoskeleton of spiny, calcium-rich plates 
C)  bilateral symmetry in larva 
D)  both sexual and asexual reproduction 
E)  All of the answer choices describe characteristics of echinoderms.

Question 6

The largest animal group, both in number of species and number of individuals, is the

Accepted Answer

A)  annelids. 
B)  crustacea. 
C)  insects. 
D)  reptiles. 
E)  fishes. 
A)  annelids. 
B)  crustacea. 
C)  insects. 
D)  reptiles. 
E)  fishes.

Question 7

Which of the following correctly matches the common name with a phylum name?

Accepted Answer

A)  planarian-Nematoda 
B)  fluke-Platyhelminthes 
C)  coral-Porifera 
D)  roundworm-Cnidaria 
E)  sponge-Arthropoda 
A)  planarian-Nematoda 
B)  fluke-Platyhelminthes 
C)  coral-Porifera 
D)  roundworm-Cnidaria 
E)  sponge-Arthropoda

Question 8

Which of the following statements is/are true about deuterostomes?

Accepted Answer

A)  The second opening during embryonic development becomes the mouth. 
B)  Echinoderms are deuterostomes. 
C)  Deuterostomes have a coelom. 
D)  Deuterostomes have radial cleavage. 
E)  All of the answer choices are true statements about deuterstomes. 
A)  The second opening during embryonic development becomes the mouth. 
B)  Echinoderms are deuterostomes. 
C)  Deuterostomes have a coelom. 
D)  Deuterostomes have radial cleavage. 
E)  All of the answer choices are true statements about deuterstomes.

Question 9

Animals that have no particular symmetry exhibit

Accepted Answer

A)  asymmetry. 
B)  radial symmetry. 
C)  bilateral symmetry. 
D)  trilateral symmetry. 
E)  spherical symmetry. 
A)  asymmetry. 
B)  radial symmetry. 
C)  bilateral symmetry. 
D)  trilateral symmetry. 
E)  spherical symmetry.

Question 10

Which of the following statements about hydra morphology is correct?

Accepted Answer

A)  The hydra has a long single tentacle containing numerous nematocysts. 
B)  The hydra has a single polyp that is filled with gas and keeps the organism afloat. 
C)  The hydra is bell shaped and has multiple tentacles. 
D)  The hydra is a tube-shaped polyp that has two layers of tissue. 
E)  The hydra is bilaterally symmetrical. 
A)  The hydra has a long single tentacle containing numerous nematocysts. 
B)  The hydra has a single polyp that is filled with gas and keeps the organism afloat. 
C)  The hydra is bell shaped and has multiple tentacles. 
D)  The hydra is a tube-shaped polyp that has two layers of tissue. 
E)  The hydra is bilaterally symmetrical.

Question 11

An adaptation exhibited by the tapeworm for survival in a host's intestine is

Accepted Answer

A)  proglottids coated with calcium carbonate. 
B)  alkaline secretions from the scolex. 
C)  a protective lining of chitin. 
D)  releasing eggs before the proglottids reach the intestinal tract. 
E)  a tough integument resistant to the digestive fluids of the host. 
A)  proglottids coated with calcium carbonate. 
B)  alkaline secretions from the scolex. 
C)  a protective lining of chitin. 
D)  releasing eggs before the proglottids reach the intestinal tract. 
E)  a tough integument resistant to the digestive fluids of the host.

Question 12

The segments of a tapeworm consisting primarily of eggs, which are located behind the head, are called

Accepted Answer

A)  proglottids. 
B)  cercariae. 
C)  sporocysts. 
D)  scolexes. 
E)  glycocalyxes. 
A)  proglottids. 
B)  cercariae. 
C)  sporocysts. 
D)  scolexes. 
E)  glycocalyxes.

Question 13

One of the many interesting features of flatworms are flame cells. What are flame cells used for?

Accepted Answer

A)  light detection 
B)  storing sperm 
C)  digestion of food 
D)  generating body heat 
E)  excretion of excess water 
A)  light detection 
B)  storing sperm 
C)  digestion of food 
D)  generating body heat 
E)  excretion of excess water

Question 14

Which of the following statements about sponges is correct?

Accepted Answer

A)  Sponges have many nerve fibers. 
B)  Sponges have well-developed muscle fibers. 
C)  Amoeboid cells are the sites of digestion in a sponge. 
D)  Sponges only reproduce asexually. 
E)  If a sponge cell becomes separated from the sponge body, it dies immediately. 
A)  Sponges have many nerve fibers. 
B)  Sponges have well-developed muscle fibers. 
C)  Amoeboid cells are the sites of digestion in a sponge. 
D)  Sponges only reproduce asexually. 
E)  If a sponge cell becomes separated from the sponge body, it dies immediately.

Question 15

Which of the following organisms is lacking one of the five characteristics typically found in animals?

Accepted Answer

A)  sponges, which have no true tissues but have two layers of cells that perform different functions 
B)  planaria, who have an incomplete digestive tract but do have muscles and excretory and reproductive systems 
C)  trypanosome, a single-celled organism that causes sleeping sickness in humans 
D)  leeches, segmented worms that are predatory on other animals 
E)  tapeworms, flatworms that infest the intestines of humans 
A)  sponges, which have no true tissues but have two layers of cells that perform different functions 
B)  planaria, who have an incomplete digestive tract but do have muscles and excretory and reproductive systems 
C)  trypanosome, a single-celled organism that causes sleeping sickness in humans 
D)  leeches, segmented worms that are predatory on other animals 
E)  tapeworms, flatworms that infest the intestines of humans

Question 16

The most likely ancestors of the chordates are considered to be echinoderms because

Accepted Answer

A)  both groups reproduce sexually and asexually. 
B)  both groups exhibit similar predatory behaviors. 
C)  embryos of echinoderms and chordates are deuterostomes. 
D)  adult echinoderms and adult chordates display similar characteristics. 
E)  the nervous system of echinoderms is similar to that of chordates. 
A)  both groups reproduce sexually and asexually. 
B)  both groups exhibit similar predatory behaviors. 
C)  embryos of echinoderms and chordates are deuterostomes. 
D)  adult echinoderms and adult chordates display similar characteristics. 
E)  the nervous system of echinoderms is similar to that of chordates.

Question 17

Which of these parasitic worms is a fluke?

Accepted Answer

A)  Ascaris 
B)  Trichinella 
C)  the worm that causes elephantiasis 
D)  hookworm 
E)  the worm that causes schistosomiasis 
A)  Ascaris 
B)  Trichinella 
C)  the worm that causes elephantiasis 
D)  hookworm 
E)  the worm that causes schistosomiasis

Question 18

Protostomes are distinguised from deuterostomes based on

Accepted Answer

A)  the presence or absence of a nervous system. 
B)  the pattern of embryonic development. 
C)  the presence or absence of a circulatory system. 
D)  the presence of absence of cephalization. 
E)  feeding behaviors. 
A)  the presence or absence of a nervous system. 
B)  the pattern of embryonic development. 
C)  the presence or absence of a circulatory system. 
D)  the presence of absence of cephalization. 
E)  feeding behaviors.

Question 19

A sponge actually feeds by

Accepted Answer

A)  actively capturing their prey with stinging cells. 
B)  drawing water in and out through the osculum. 
C)  producing water currents that flow through the pores into the central cavity and out through the osculum. 
D)  producing water currents that flow through the osculum into the pores and out through the central cavity. 
E)  photosynthesis. 
A)  actively capturing their prey with stinging cells. 
B)  drawing water in and out through the osculum. 
C)  producing water currents that flow through the pores into the central cavity and out through the osculum. 
D)  producing water currents that flow through the osculum into the pores and out through the central cavity. 
E)  photosynthesis.

Question 20

When an earthworm secretes a slime layer to receive eggs and sperm and form a ''cocoon,'' this secretion is produced by the

Accepted Answer

A)  annulations. 
B)  peritoneum. 
C)  clitellum. 
D)  nephridium. 
E)  prostomium. 
A)  annulations. 
B)  peritoneum. 
C)  clitellum. 
D)  nephridium. 
E)  prostomium.

Exam 31: Animals: the Invertebrates

Which of the following statements is correct about the flatworms?

Which of the following is characteristic of flukes?

Which of the following is a characteristic of all animals?

Earthworms are

Which of the following is a characteristic of echinoderms?

The largest animal group, both in number of species and number of individuals, is the

Which of the following correctly matches the common name with a phylum name?

Which of the following statements is/are true about deuterostomes?

Animals that have no particular symmetry exhibit

Which of the following statements about hydra morphology is correct?

An adaptation exhibited by the tapeworm for survival in a host's intestine is

The segments of a tapeworm consisting primarily of eggs, which are located behind the head, are called

One of the many interesting features of flatworms are flame cells. What are flame cells used for?

Which of the following statements about sponges is correct?

Which of the following organisms is lacking one of the five characteristics typically found in animals?

The most likely ancestors of the chordates are considered to be echinoderms because

Which of these parasitic worms is a fluke?

Protostomes are distinguised from deuterostomes based on

A sponge actually feeds by

When an earthworm secretes a slime layer to receive eggs and sperm and form a ''cocoon,'' this secretion is produced by the

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