Question 1

Which of the following is not characteristic of interspecific competition?

Accepted Answer

A)  One or more resources is limiting. 
B)  The population size of at least one species decreases. 
C)  The limiting resource does not change over time. 
D)  Two or more species interact. 
E)  none of the above 
A)  One or more resources is limiting. 
B)  The population size of at least one species decreases. 
C)  The limiting resource does not change over time. 
D)  Two or more species interact. 
E)  none of the above

Question 2

Connell concluded that Semibalanus and Chthamalus compete because

Accepted Answer

A)  Semibalanus cannot survive in the lower intertidal. 
B)  removal of Semibalanus led to colonization by Chthamalus. 
C)  Chthamalus is able to live high and low in the intertidal. 
D)  he found that space is not limiting. 
E)  none of the above 
A)  Semibalanus cannot survive in the lower intertidal. 
B)  removal of Semibalanus led to colonization by Chthamalus. 
C)  Chthamalus is able to live high and low in the intertidal. 
D)  he found that space is not limiting. 
E)  none of the above

Question 3

Diffuse competition

Accepted Answer

A)  is the result of diffuse resources. 
B)  occurs when one species preempts space. 
C)  is the result of many competitors. 
D)  is the result of a single dominant competitor. 
E)  none of the above 
A)  is the result of diffuse resources. 
B)  occurs when one species preempts space. 
C)  is the result of many competitors. 
D)  is the result of a single dominant competitor. 
E)  none of the above

Question 4

Which of the following does not directly affect the intensity of competition?

Accepted Answer

A)  the presence of similar species 
B)  niche overlap 
C)  niche breadth 
D)  the density of competitors 
E)  none of the above 
A)  the presence of similar species 
B)  niche overlap 
C)  niche breadth 
D)  the density of competitors 
E)  none of the above

Question 5

In a deWitt replacement series, the most intense interspecific competition occurs when

Accepted Answer

A)  the null hypothesis is rejected. 
B)  the numbers of individuals of the two species are equal. 
C)  the numbers of individuals of the two species are most different. 
D)  if the performance of one species is the same as that of the other. 
E)  none of the above 
A)  the null hypothesis is rejected. 
B)  the numbers of individuals of the two species are equal. 
C)  the numbers of individuals of the two species are most different. 
D)  if the performance of one species is the same as that of the other. 
E)  none of the above

Question 6

Semibalanus and Chthamalus compete for light resources.

Accepted Answer

A) True 
 B)False

Question 7

When disturbance is frequent, competition is often less intense.

Accepted Answer

A) True 
 B)False

Question 8

When the land bridge formed between North and South America,

Accepted Answer

A)  character displacement occurred. 
B)  marsupials invaded North America. 
C)  placental mammals invaded North America. 
D)  placental carnivores drove some marsupials extinct. 
E)  none of the above 
A)  character displacement occurred. 
B)  marsupials invaded North America. 
C)  placental mammals invaded North America. 
D)  placental carnivores drove some marsupials extinct. 
E)  none of the above

Question 9

Character displacement

Accepted Answer

A)  is the result of selection to decrease niche overlap. 
B)  is the result of selection to increase niche breadth. 
C)  is the result of disruptive selection. 
D)  requires diffuse competition. 
E)  none of the above 
A)  is the result of selection to decrease niche overlap. 
B)  is the result of selection to increase niche breadth. 
C)  is the result of disruptive selection. 
D)  requires diffuse competition. 
E)  none of the above

Question 10

The null hypothesis in a deWitt replacement experiment

Accepted Answer

A)  assumes that interspecific and intraspecific competition are equivalent. 
B)  determines the outcome of the experiment. 
C)  assumes that interspecific competition is greater than intraspecific competition. 
D)  assumes that intraspecific competition is greater than interspecific competition. 
E)  none of the above 
A)  assumes that interspecific and intraspecific competition are equivalent. 
B)  determines the outcome of the experiment. 
C)  assumes that interspecific competition is greater than intraspecific competition. 
D)  assumes that intraspecific competition is greater than interspecific competition. 
E)  none of the above

Question 11

Adaptive radiations are likely to occur

Accepted Answer

A)  when species face increased competition. 
B)  when competition decreased competition. 
C)  only on islands. 
D)  after islands are connected to the mainland. 
E)  none of the above 
A)  when species face increased competition. 
B)  when competition decreased competition. 
C)  only on islands. 
D)  after islands are connected to the mainland. 
E)  none of the above

Question 12

Directional selection on the niche to reduce overlap leads to __________.

Accepted Answer

Character

Question 13

Character displacement is the result of reduced competition.

Accepted Answer

A) True 
 B)False

Question 14

The functional niche is the __________ whereas the __________ is set of biological and physical resources that determine fitness.

Accepted Answer

role of the organism

Which of the following is not characteristic of interspecific competition?

Connell concluded that Semibalanus and Chthamalus compete because

Diffuse competition

Which of the following does not directly affect the intensity of competition?

In a deWitt replacement series, the most intense interspecific competition occurs when

Semibalanus and Chthamalus compete for light resources.

When disturbance is frequent, competition is often less intense.

When the land bridge formed between North and South America,

Character displacement

The null hypothesis in a deWitt replacement experiment

Adaptive radiations are likely to occur

Directional selection on the niche to reduce overlap leads to __________.

Character displacement is the result of reduced competition.

The functional niche is the whereas the is set of biological and physical resources that determine fitness.

Introduction to Ecology

Adaptation and Evolution

Adaptations to the Physical Environment

Terrestrial Communities

Fresh-water and Marine Communities

Behavioral Ecology

The Ecology of Intraspecific Variation

Demography

Population Regulation

Life History Strategies

Coevolution I Exploitative Interactions

Mutualism

The Structure of Communities

Ecological Succession

Species Diversity

Energy Flow and Trophic Structure

Biogeochemical Cycles

Conservation Biology

Landscape Ecology

Human Global Ecology

Filters

Exam 11: Competition

Which of the following is not characteristic of interspecific competition?

Connell concluded that Semibalanus and Chthamalus compete because

Diffuse competition

Which of the following does not directly affect the intensity of competition?

In a deWitt replacement series, the most intense interspecific competition occurs when

Semibalanus and Chthamalus compete for light resources.

When disturbance is frequent, competition is often less intense.

When the land bridge formed between North and South America,

Character displacement

The null hypothesis in a deWitt replacement experiment

Adaptive radiations are likely to occur

Directional selection on the niche to reduce overlap leads to __________.

Character displacement is the result of reduced competition.

The functional niche is the __________ whereas the __________ is set of biological and physical resources that determine fitness.

Introduction to Ecology

Adaptation and Evolution

Adaptations to the Physical Environment

Terrestrial Communities

Fresh-water and Marine Communities

Behavioral Ecology

The Ecology of Intraspecific Variation

Demography

Population Regulation

Life History Strategies

Coevolution I Exploitative Interactions

Mutualism

The Structure of Communities

Ecological Succession

Species Diversity

Energy Flow and Trophic Structure

Biogeochemical Cycles

Conservation Biology

Landscape Ecology

Human Global Ecology

Filters

The functional niche is the whereas the is set of biological and physical resources that determine fitness.