Question 1

Which of the following is not considered part of the body plan of an organism?

Accepted Answer

A)  The symmetry of the body 
B)  The structure of the body cavity 
C)  The segmentation of the body 
D)  External appendages 
E)  The larval morphology 
A)  The symmetry of the body 
B)  The structure of the body cavity 
C)  The segmentation of the body 
D)  External appendages 
E)  The larval morphology

Question 2

Which statement best distinguishes the difference between placozoans and scyphozoans?

Accepted Answer

A)  Adult placozoans are symmetrical, while adult scyphozoans are asymmetrical. 
B)  Adult placozoans have no mouth or gut, while adult scyphozoans have these structures. 
C)  Placozoans have a mobile, pelagic life stage, while scyphozoans do not. 
D)  Adult placozoans are large in size, while adult scyphozoans are small in size. 
E)  Placozoans only reproduce asexually, while adult scyphozoans only reproduce sexually. 
A)  Adult placozoans are symmetrical, while adult scyphozoans are asymmetrical. 
B)  Adult placozoans have no mouth or gut, while adult scyphozoans have these structures. 
C)  Placozoans have a mobile, pelagic life stage, while scyphozoans do not. 
D)  Adult placozoans are large in size, while adult scyphozoans are small in size. 
E)  Placozoans only reproduce asexually, while adult scyphozoans only reproduce sexually.

Question 3

Which type of sponge cell is specialized for creating the currents that draw food particles into the sponge?

Accepted Answer

A)  Spicule 
B)  Pore cell 
C)  Osculum 
D)  Choanocyte 
E)  Nematocyst 
A)  Spicule 
B)  Pore cell 
C)  Osculum 
D)  Choanocyte 
E)  Nematocyst

Question 4

A pseudocoelomate animal lacks a

Accepted Answer

A)  body cavity. 
B)  fluid-filled body cavity. 
C)  fluid-filled body cavity lined on the outside with mesoderm. 
D)  fluid-filled body cavity lined on the outside and inside with mesoderm. 
E)  pseudocoel. 
A)  body cavity. 
B)  fluid-filled body cavity. 
C)  fluid-filled body cavity lined on the outside with mesoderm. 
D)  fluid-filled body cavity lined on the outside and inside with mesoderm. 
E)  pseudocoel.

Question 5

Functions of the nervous system include

Accepted Answer

A)  producing gametes. 
B)  coordinating muscle action for efficient movement. 
C)  body support. 
D)  forming the peritoneum. 
E)  budding. 
A)  producing gametes. 
B)  coordinating muscle action for efficient movement. 
C)  body support. 
D)  forming the peritoneum. 
E)  budding.

Question 6

Which two animal groups are distinguished from each other by the number of embryonic cell layers they have?

Accepted Answer

A)  Bilaterians and cnidarians 
B)  Ctenophores and cnidarians 
C)  Demosponges and glass sponges 
D)  Protostomes and deuterostomes 
E)  Echinoderms and hemichordates 
A)  Bilaterians and cnidarians 
B)  Ctenophores and cnidarians 
C)  Demosponges and glass sponges 
D)  Protostomes and deuterostomes 
E)  Echinoderms and hemichordates

Question 7

Discuss the two major strategies animals use to get food, and indicate which of these is used by most sessile organisms.

Accepted Answer

Animals can either move through the envi

Question 8

What are one or more advantages and one or more disadvantages of being a colonial animal?
There are benefits and costs to animals that live colonially.List an advantage and a disadvantage of coloniality.

Accepted Answer

Advantages of coloniality include increa

Question 9

Sponges

Accepted Answer

A)  were once thought to be plants. 
B)  do not share a common ancestor with animals. 
C)  are symmetrical. 
D)  have cell layers and true organs. 
E)  are eumetazoans. 
A)  were once thought to be plants. 
B)  do not share a common ancestor with animals. 
C)  are symmetrical. 
D)  have cell layers and true organs. 
E)  are eumetazoans.

Question 10

_______ perform an important ecosystem function by returning nutrients to the environment in a state that can be used by other organisms.

Accepted Answer

A)  Filter feeders 
B)  Herbivores 
C)  Predators 
D)  Parasites 
E)  Detritivores 
A)  Filter feeders 
B)  Herbivores 
C)  Predators 
D)  Parasites 
E)  Detritivores

Question 11

Refer to the table.   Which character(s) provide(s) shared derived character states that distinguish protostomes from deuterostomes and sponges?

Accepted Answer

A)  25 only 
B)  20 only 
C)  27 only 
D)  25 and 27 
E)  25, 26, and 27 
A)  25 only 
B)  20 only 
C)  27 only 
D)  25 and 27 
E)  25, 26, and 27

Question 12

Precocial birds

Accepted Answer

A)  incubate their eggs for a short period of time. 
B)  produce many large eggs. 
C)  produce small numbers of eggs. 
D)  produce few small eggs. 
E)  incubate their eggs for a long period of time. 
A)  incubate their eggs for a short period of time. 
B)  produce many large eggs. 
C)  produce small numbers of eggs. 
D)  produce few small eggs. 
E)  incubate their eggs for a long period of time.

Question 13

Which of the following is a difference between fungi and animals?

Accepted Answer

A)  Only fungi are heterotrophic. 
B)  Only fungi are multicellular. 
C)  Only fungi have external digestion. 
D)  Only animals have external digestion. 
E)  Only fungi are unicellular. 
A)  Only fungi are heterotrophic. 
B)  Only fungi are multicellular. 
C)  Only fungi have external digestion. 
D)  Only animals have external digestion. 
E)  Only fungi are unicellular.

Question 14

A body form with radial symmetry is most likely found in

Accepted Answer

A)  a chordate that is a prey animal. 
B)  a predator that drifts through the ocean. 
C)  an animal that burrows through soil. 
D)  an animal that is an herbivore. 
E)  an animal with cephalization. 
A)  a chordate that is a prey animal. 
B)  a predator that drifts through the ocean. 
C)  an animal that burrows through soil. 
D)  an animal that is an herbivore. 
E)  an animal with cephalization.

Question 15

Endoparasites
a. are generally more simple morphologically than ectoparasites.
b. have mouthparts that enable them to pierce the host's tissues.
c. include ticks.
d. are able to break down tough, fibrous tissue.
e. have a complete digestive system.

Accepted Answer

a
Hint. Endoparasite

Question 16

Animals that live in or on another organism and obtain nutrients from it are known as _______.

Accepted Answer

The answer of Animals that live in or on another...

Question 17

Which feature is a synapomorphy of the animals?

Accepted Answer

A)  Cells that contain chitin 
B)  Vascular systems 
C)  Similarities in Hox genes 
D)  Bilateral symmetry 
E)  Spiral cleavage 
A)  Cells that contain chitin 
B)  Vascular systems 
C)  Similarities in Hox genes 
D)  Bilateral symmetry 
E)  Spiral cleavage

Question 18

An animal with _______ symmetry is able to search headfirst for food items in its environment.

Accepted Answer

The answer of An animal with _______ symmetry is able...

Question 19

The major animal groups exhibit multiple feeding strategies because there is

Accepted Answer

A)  a periodic need to obtain food. 
B)  a stable source of nutrients in any given environment. 
C)  competition with other animal species to obtain food. 
D)  abundant food items available in all habitats. 
E)  specialization of function in animal populations. 
A)  a periodic need to obtain food. 
B)  a stable source of nutrients in any given environment. 
C)  competition with other animal species to obtain food. 
D)  abundant food items available in all habitats. 
E)  specialization of function in animal populations.

Question 20

In animals, coordination of actions of muscles is made possible by

Accepted Answer

A)  segmentation. 
B)  bilateral symmetry. 
C)  a nervous system. 
D)  body cavities. 
E)  appendages. 
A)  segmentation. 
B)  bilateral symmetry. 
C)  a nervous system. 
D)  body cavities. 
E)  appendages.

Exam 30: Animal Origins and the Evolution of Body Plans

Which of the following is not considered part of the body plan of an organism?

Which statement best distinguishes the difference between placozoans and scyphozoans?

Which type of sponge cell is specialized for creating the currents that draw food particles into the sponge?

A pseudocoelomate animal lacks a

Functions of the nervous system include

Which two animal groups are distinguished from each other by the number of embryonic cell layers they have?

Discuss the two major strategies animals use to get food, and indicate which of these is used by most sessile organisms.

What are one or more advantages and one or more disadvantages of being a colonial animal? There are benefits and costs to animals that live colonially.List an advantage and a disadvantage of coloniality.

Sponges

_______ perform an important ecosystem function by returning nutrients to the environment in a state that can be used by other organisms.

Refer to the table. Which character(s) provide(s) shared derived character states that distinguish protostomes from deuterostomes and sponges?

Precocial birds

Which of the following is a difference between fungi and animals?

A body form with radial symmetry is most likely found in

Endoparasites a. are generally more simple morphologically than ectoparasites. b. have mouthparts that enable them to pierce the host's tissues. c. include ticks. d. are able to break down tough, fibrous tissue. e. have a complete digestive system.

Animals that live in or on another organism and obtain nutrients from it are known as _______.

Which feature is a synapomorphy of the animals?

An animal with _______ symmetry is able to search headfirst for food items in its environment.

The major animal groups exhibit multiple feeding strategies because there is

In animals, coordination of actions of muscles is made possible by

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

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Dna and Its Role in Heredity

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Gene Mutation and Molecular Medicine

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Mechanisms of Evolution

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The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

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The Mammalian Nervous System: Structure and Higher Functions

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Animal Behavior

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