Question 1

The productivity of an ecosystem usually_________ through succession.

Accepted Answer

The answer of The productivity of an ecosystem usually_________ through...

Question 2

A species that is a mimic will most likely

Accepted Answer

A)  use bright colors to warn that it is harmful. 
B)  produce ʺsmoke screens.ʺ 
C)  produce chemicals that deter predators. 
D)  resemble its surroundings. 
E)  have a behavior similar to that of a more toxic species. 
A)  use bright colors to warn that it is harmful. 
B)  produce ʺsmoke screens.ʺ 
C)  produce chemicals that deter predators. 
D)  resemble its surroundings. 
E)  have a behavior similar to that of a more toxic species.

Question 3

Intraspecific competition limits population size.

Accepted Answer

A) True 
 B)False

Question 4

In the process called__________ , interactions between species can limit population size, but can also influence the physical characteristics and behaviors of the interacting populations.

Accepted Answer

A)  camouflage 
B)  mutualism 
C)  symbiosis 
D)  coevolution 
E)  succession 
A)  camouflage 
B)  mutualism 
C)  symbiosis 
D)  coevolution 
E)  succession

Question 5

In_________ , the interaction between two species harms both of them.

Accepted Answer

A)  symbiosis 
B)  competition 
C)  coevolution 
D)  mutualism 
E)  parasitism 
A)  symbiosis 
B)  competition 
C)  coevolution 
D)  mutualism 
E)  parasitism

Question 6

The concept that two species cannot occupy the same ecological niche at the same time is called

Accepted Answer

A)  the competitive exclusion principle. 
B)  mutualism. 
C)  succession. 
D)  predation. 
E)  coevolution. 
A)  the competitive exclusion principle. 
B)  mutualism. 
C)  succession. 
D)  predation. 
E)  coevolution.

Question 7

In his study of the foraging behavior of bumblebees, D. W. Inouye noted that both Bombus appositus and Bombus flavifrons feed from both larkspur and monkshood flowers when each is the only bumblebee species present. However, when both species are present, B. appositus feeds on only larkspur and B. flavifrons feeds on monkshood. This behavior is an example of

Accepted Answer

A)  resource partitioning. 
B)  intraspecific competition. 
C)  habitat fragmentation. 
D)  predation. 
E)  aggressive mimicry. 
A)  resource partitioning. 
B)  intraspecific competition. 
C)  habitat fragmentation. 
D)  predation. 
E)  aggressive mimicry.

Question 8

Parasites are generally smaller than their host.

Accepted Answer

A) True 
 B)False

Question 9

What factor most determines the intensity of interspecific competition?

Accepted Answer

The degree of simila

Question 10

Shade-tolerant plant species are generally found early in succession and are replaced by hardier, shade-intolerant species.

Accepted Answer

A) True 
 B)False

Question 11

The sea dragon in the illustration displays

Accepted Answer

A)  warning coloration. 
B)  camouflage. 
C)  chemical defenses. 
D)  aggressive mimicry. 
E)  startle coloration. 
A)  warning coloration. 
B)  camouflage. 
C)  chemical defenses. 
D)  aggressive mimicry. 
E)  startle coloration.

Question 12

Plants called legumes have chambers in their roots that house nitrogen-fixing bacteria. Nitrogen-fixing bacteria get both a place to live and energy while supplying nitrogen to a plant. What is this ecological relationship called?

Accepted Answer

A)  Competition 
B)  Predation 
C)  Succession 
D)  Mutualism 
E)  Parasitism 
A)  Competition 
B)  Predation 
C)  Succession 
D)  Mutualism 
E)  Parasitism

Question 13

If you find a brightly colored insect resting on a dead leaf, the insect is likely to

Accepted Answer

A)  have aggressive mimicry. 
B)  be prey for birds. 
C)  have startle coloration. 
D)  be camouflaged. 
E)  be poisonous or distasteful. 
A)  have aggressive mimicry. 
B)  be prey for birds. 
C)  have startle coloration. 
D)  be camouflaged. 
E)  be poisonous or distasteful.

Question 14

A keystone species is the most numerous species in an ecosystem.

Accepted Answer

A) True 
 B)False

Question 15

Startle coloration is used to attract mates.

Accepted Answer

A) True 
 B)False

Question 16

Ornithologists visiting an island find two species of birds that appear nearly identical except for bill size. Which of the following is the most likely explanation for their discovery?

Accepted Answer

A)  They are not separate species. 
B)  The birds need camouflage for protection from predators. 
C)  There is natural random variability. 
D)  Coevolution of the two species has resulted in resource partitioning between the species. 
E)  Mutations have resulted in an inferior species with defective bills. 
A)  They are not separate species. 
B)  The birds need camouflage for protection from predators. 
C)  There is natural random variability. 
D)  Coevolution of the two species has resulted in resource partitioning between the species. 
E)  Mutations have resulted in an inferior species with defective bills.

Question 17

Harmless king snakes mimic the color patterns of venomous coral snakes, which serve as models. If avoidance were based solely on prior predator experience with the model, what do you predict would happen in areas where coral snakes were never present?

Accepted Answer

A)  Predators would initially avoid king snakes but soon learn to attack and eat them. 
B)  Predators would initially attack and eat king snakes but soon learn to avoid them. 
C)  Predators would avoid king snakes. 
D)  No predictions can be made based on the information given. 
E)  Predators would attack and eat king snakes. 
A)  Predators would initially avoid king snakes but soon learn to attack and eat them. 
B)  Predators would initially attack and eat king snakes but soon learn to avoid them. 
C)  Predators would avoid king snakes. 
D)  No predictions can be made based on the information given. 
E)  Predators would attack and eat king snakes.

Question 18

Insects that feed on plants without completely consuming them may be classified as

Accepted Answer

A)  predators. 
B)  parasites. 
C)  hosts. 
D)  mutualists. 
E)  prey. 
A)  predators. 
B)  parasites. 
C)  hosts. 
D)  mutualists. 
E)  prey.

Question 19

Succession that begins on bare rock after glaciers have passed, or on newly formed volcanic islands, is

Accepted Answer

A)  pioneer. 
B)  primary. 
C)  secondary. 
D)  autogenic. 
E)  allogenic. 
A)  pioneer. 
B)  primary. 
C)  secondary. 
D)  autogenic. 
E)  allogenic.

Question 20

Several ecology students were tracking the population ranges of two species of squirrels that live in the Cascade Range of Oregon. These students noted that when both species of squirrels were present in a region, species A could be found from sea level to about 900 feet above sea level, and species B could be found from about 900 feet to 1,500 feet above sea level. However, when species B was found alone, it had a range of about 500 feet to 1,500 feet above sea level. This is an example of

Accepted Answer

A)  predator avoidance. 
B)  competitive exclusion. 
C)  habitat fragmentation. 
D)  parasitism. 
E)  coevolution. 
A)  predator avoidance. 
B)  competitive exclusion. 
C)  habitat fragmentation. 
D)  parasitism. 
E)  coevolution.

Exam 28: Community Interactions

The productivity of an ecosystem usually_________ through succession.

A species that is a mimic will most likely

Intraspecific competition limits population size.

In the process called__________ , interactions between species can limit population size, but can also influence the physical characteristics and behaviors of the interacting populations.

In_________ , the interaction between two species harms both of them.

The concept that two species cannot occupy the same ecological niche at the same time is called

Parasites are generally smaller than their host.

What factor most determines the intensity of interspecific competition?

Shade-tolerant plant species are generally found early in succession and are replaced by hardier, shade-intolerant species.

The sea dragon in the illustration displays

Plants called legumes have chambers in their roots that house nitrogen-fixing bacteria. Nitrogen-fixing bacteria get both a place to live and energy while supplying nitrogen to a plant. What is this ecological relationship called?

If you find a brightly colored insect resting on a dead leaf, the insect is likely to

A keystone species is the most numerous species in an ecosystem.

Startle coloration is used to attract mates.

Ornithologists visiting an island find two species of birds that appear nearly identical except for bill size. Which of the following is the most likely explanation for their discovery?

Harmless king snakes mimic the color patterns of venomous coral snakes, which serve as models. If avoidance were based solely on prior predator experience with the model, what do you predict would happen in areas where coral snakes were never present?

Insects that feed on plants without completely consuming them may be classified as

Succession that begins on bare rock after glaciers have passed, or on newly formed volcanic islands, is

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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