Question 1

Earthworms break down organic matter and build up rich soils.They are an example of

Accepted Answer

A)  omnivores. 
B)  herbivores. 
C)  detritivores. 
D)  parasites. 
E)  nematocysts. 
A)  omnivores. 
B)  herbivores. 
C)  detritivores. 
D)  parasites. 
E)  nematocysts.

Question 2

Which two food acquisition methods often involve feeding on other organisms without killing or significantly damaging them?

Accepted Answer

A)  Parasitism and predation 
B)  Omnivory and detritivory 
C)  Predation and parasitism 
D)  Herbivory and predation 
E)  Parasitism and herbivory 
A)  Parasitism and predation 
B)  Omnivory and detritivory 
C)  Predation and parasitism 
D)  Herbivory and predation 
E)  Parasitism and herbivory

Question 3

Sea pens are filter feeders and produce _______ as their straining device.

Accepted Answer

The answer of Sea pens are filter feeders and produce...

Question 4

Refer to the table.   "V" is a shared, derived character state for deuterostomes in which character(s)?

Accepted Answer

A)  17 and 19 
B)  17, 19, and 26 
C)  19 
D)  25, 26, and 27 
E)  26 
A)  17 and 19 
B)  17, 19, and 26 
C)  19 
D)  25, 26, and 27 
E)  26

Question 5

A coral animal is a _______ cnidarian in the group known as the _______.

Accepted Answer

A)  solitary; hydrozoans 
B)  solitary; scyphozoans 
C)  solitary; anthozoans 
D)  colonial; hydrozoans 
E)  colonial; anthozoans 
A)  solitary; hydrozoans 
B)  solitary; scyphozoans 
C)  solitary; anthozoans 
D)  colonial; hydrozoans 
E)  colonial; anthozoans

Question 6

Filter feeders are typically ________ animals, which stay in one place.

Accepted Answer

The answer of Filter feeders are typically ________ animals, which...

Question 7

Which of the following includes a characteristic unique to ctenophores and a characteristic unique to cnidarians?

Accepted Answer

A)  Locomotion by cilia; an aquatic habitat 
B)  Tentacles for prey capture; radial symmetry 
C)  Locomotion by bell pulsing; possession of nematocysts 
D)  Triploblastic embryonic cell layers; an aquatic habitat 
E)  Locomotion by ctenes; possession of nematocysts 
A)  Locomotion by cilia; an aquatic habitat 
B)  Tentacles for prey capture; radial symmetry 
C)  Locomotion by bell pulsing; possession of nematocysts 
D)  Triploblastic embryonic cell layers; an aquatic habitat 
E)  Locomotion by ctenes; possession of nematocysts

Question 8

The benefit of segmentation in the arthropods can be attributed to

Accepted Answer

A)  similarity of function in different parts of the body. 
B)  improved control of movement through a hydrostatic skeleton. 
C)  modification of appendages for rapid movement. 
D)  a body plan where muscles are attached to an external skeleton. 
E)  independent movement of different parts of the body. 
A)  similarity of function in different parts of the body. 
B)  improved control of movement through a hydrostatic skeleton. 
C)  modification of appendages for rapid movement. 
D)  a body plan where muscles are attached to an external skeleton. 
E)  independent movement of different parts of the body.

Question 9

Which of the following does not contribute to evidence that animals share a common ancestor?

Accepted Answer

A)  Animals share similarities in organization and function of genes such as Hox genes. 
B)  Animal cells have unique types of junctions between them. 
C)  All animals are heterotrophs. 
D)  All animals are eukaryotes. 
E)  All animals have a common set of extracellular matrix proteins. 
A)  Animals share similarities in organization and function of genes such as Hox genes. 
B)  Animal cells have unique types of junctions between them. 
C)  All animals are heterotrophs. 
D)  All animals are eukaryotes. 
E)  All animals have a common set of extracellular matrix proteins.

Question 10

A caterpillar feeds on a single plant, metamorphoses into a pupa, and into an adult moth, and flies away.This is an example of

Accepted Answer

A)  migration. 
B)  dispersal. 
C)  reproduction. 
D)  a nauplius. 
E)  a trochophore larva. 
A)  migration. 
B)  dispersal. 
C)  reproduction. 
D)  a nauplius. 
E)  a trochophore larva.

Question 11

The main difference between a coelom and a pseudocoel is a coelom is

Accepted Answer

A)  enclosed by mesodermal tissues on the outside only; a pseudocoel is enclosed by mesodermal tissues on the inside only. 
B)  not enclosed by mesodermal tissues; a pseudocoel is completely surrounded by mesodermal tissues. 
C)  enclosed by mesodermal tissues on the inside and the outside; a pseudocoel is surrounded by mesodermal tissues on the outside only. 
D)  enclosed by mesodermal tissues on the inside only; a pseudocoel is a solid structure. 
E)  derived from endodermal cells; a pseudocoel is derived from mesodermal cells. 
A)  enclosed by mesodermal tissues on the outside only; a pseudocoel is enclosed by mesodermal tissues on the inside only. 
B)  not enclosed by mesodermal tissues; a pseudocoel is completely surrounded by mesodermal tissues. 
C)  enclosed by mesodermal tissues on the inside and the outside; a pseudocoel is surrounded by mesodermal tissues on the outside only. 
D)  enclosed by mesodermal tissues on the inside only; a pseudocoel is a solid structure. 
E)  derived from endodermal cells; a pseudocoel is derived from mesodermal cells.

Question 12

Which about the medusa phase of cnidarians is true?

Accepted Answer

A)  It is the sessile and gamete production stage. 
B)  It is the sessile and dispersal stage. 
C)  It is the stage resulting from the planula larva. 
D)  It is the gamete production and dispersal stage. 
E)  It is the haploid stage. 
A)  It is the sessile and gamete production stage. 
B)  It is the sessile and dispersal stage. 
C)  It is the stage resulting from the planula larva. 
D)  It is the gamete production and dispersal stage. 
E)  It is the haploid stage.

Question 13

A filter feeder differs from a parasite in that

Accepted Answer

A)  a filter feeder requires a host, while a parasite is free living. 
B)  a filter feeder uses a straining device to obtain food, while a parasite feeds on fluids or tissues of a host. 
C)  a filter feeder ingests food items, while a parasite absorbs food items. 
D)  filter feeders are only found in marine environments, while parasites are strictly terrestrial. 
E)  a filter feeder strains food from the environment, while a parasite captures and subdues its prey. 
A)  a filter feeder requires a host, while a parasite is free living. 
B)  a filter feeder uses a straining device to obtain food, while a parasite feeds on fluids or tissues of a host. 
C)  a filter feeder ingests food items, while a parasite absorbs food items. 
D)  filter feeders are only found in marine environments, while parasites are strictly terrestrial. 
E)  a filter feeder strains food from the environment, while a parasite captures and subdues its prey.

Question 14

Which statement about the placozoan Trichoplax adhaerens is false?

Accepted Answer

A)  It has four cell types. 
B)  Mature forms have a mouth leading to a simple gut. 
C)  It is an evolutionary reversal from a more complex body form. 
D)  It has the smallest genome of any known animal. 
E)  It is not closely related to other major animal groups. 
A)  It has four cell types. 
B)  Mature forms have a mouth leading to a simple gut. 
C)  It is an evolutionary reversal from a more complex body form. 
D)  It has the smallest genome of any known animal. 
E)  It is not closely related to other major animal groups.

Question 15

Refer to the figure.   The nauplius shown is the larval form of

Accepted Answer

A)  mollusks and crustaceans. 
B)  crustaceans only. 
C)  mollusks only. 
D)  polychaete worms and echinoderms. 
E)  polychaete worms and mollusks. 
A)  mollusks and crustaceans. 
B)  crustaceans only. 
C)  mollusks only. 
D)  polychaete worms and echinoderms. 
E)  polychaete worms and mollusks.

Question 16

Refer to the table, which compares 27 amino acid positions for ten different species.   Which lancelet character has a state that is shared with the protostomes?

Accepted Answer

A)  3 
B)  11 
C)  13 
D)  22 
E)  23 
A)  3 
B)  11 
C)  13 
D)  22 
E)  23

Question 17

_______ eat plants and animals.

Accepted Answer

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

Question 18

Which of the following are deuterostomes?

Accepted Answer

A)  Chickens, lizards, and fishes 
B)  Lancelets, mollusks, and humans 
C)  Elephants, lizards, mollusks, and chickens 
D)  Humans, snakes, chelicerates, and moose 
E)  Fishes, echinoderms, and arrow worms 
A)  Chickens, lizards, and fishes 
B)  Lancelets, mollusks, and humans 
C)  Elephants, lizards, mollusks, and chickens 
D)  Humans, snakes, chelicerates, and moose 
E)  Fishes, echinoderms, and arrow worms

Question 19

A coelom differs from a pseudocoel in that

Accepted Answer

A)  a coelom is filled with mesenchyme, while a pseudocoel has no mesenchyme. 
B)  a coelom acts as a hydrostatic skeleton in some animals, but not in pseudocoelomates. 
C)  a coelom is fluid-filled, while a pseudocoel is not. 
D)  a coelom develops within the mesoderm, while a pseudocoel is enclosed by mesoderm only on the outside. 
E)  a coelom is lined with endoderm, while a pseudocoel is lined with a peritoneum. 
A)  a coelom is filled with mesenchyme, while a pseudocoel has no mesenchyme. 
B)  a coelom acts as a hydrostatic skeleton in some animals, but not in pseudocoelomates. 
C)  a coelom is fluid-filled, while a pseudocoel is not. 
D)  a coelom develops within the mesoderm, while a pseudocoel is enclosed by mesoderm only on the outside. 
E)  a coelom is lined with endoderm, while a pseudocoel is lined with a peritoneum.

Question 20

Refer to the figure.   Suppose you find an animal in a seawater sample that looks like the organism shown in the figure.What conclusions would you be able to make about the way this organism moves and feeds?

Accepted Answer

This organism probably capture

Exam 30: Animal Origins and the Evolution of Body Plans

Earthworms break down organic matter and build up rich soils.They are an example of

Which two food acquisition methods often involve feeding on other organisms without killing or significantly damaging them?

Sea pens are filter feeders and produce _______ as their straining device.

Refer to the table. "V" is a shared, derived character state for deuterostomes in which character(s)?

A coral animal is a _______ cnidarian in the group known as the _______.

Filter feeders are typically ________ animals, which stay in one place.

Which of the following includes a characteristic unique to ctenophores and a characteristic unique to cnidarians?

The benefit of segmentation in the arthropods can be attributed to

Which of the following does not contribute to evidence that animals share a common ancestor?

A caterpillar feeds on a single plant, metamorphoses into a pupa, and into an adult moth, and flies away.This is an example of

The main difference between a coelom and a pseudocoel is a coelom is

Which about the medusa phase of cnidarians is true?

A filter feeder differs from a parasite in that

Which statement about the placozoan Trichoplax adhaerens is false?

Refer to the figure. The nauplius shown is the larval form of

Refer to the table, which compares 27 amino acid positions for ten different species. Which lancelet character has a state that is shared with the protostomes?

_______ eat plants and animals.

Which of the following are deuterostomes?

A coelom differs from a pseudocoel in that

Refer to the figure. Suppose you find an animal in a seawater sample that looks like the organism shown in the figure.What conclusions would you be able to make about the way this organism moves and feeds?

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

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Populations

Species Interactions

Communities

Ecosystems

A Changing Biosphere

Filters

A coral animal is a _ cnidarian in the group known as the _.