Question 1

Encounter competition results from the behavioral exclusion of some individuals by others from a specific space that is defended.

Accepted Answer

A) True 
 B)False  False

Question 2

Which of the following is a nonresource (or nonconsumable resource)that can influence the outcome of competition among plant species?

Accepted Answer

A) temperature 
B) light 
C) water 
D) nitrogen 
A) temperature 
B) light 
C) water 
D) nitrogen A

Question 3

Periods of drought or extreme environmental conditions may depress the ________ of a species below its carrying capacity (K).

Accepted Answer

population

Question 4

Demonstrating the occurrence of interspecific competition during a field study is problematic for all of the following reasons,except

Accepted Answer

A) it is difficult to know whether a population is at carrying capacity. 
B) competition is impossible to measure in a natural setting. 
C) scientists cannot control the environment. 
D) scientists lack full knowledge of the life history requirements of natural populations. 
A) it is difficult to know whether a population is at carrying capacity. 
B) competition is impossible to measure in a natural setting. 
C) scientists cannot control the environment. 
D) scientists lack full knowledge of the life history requirements of natural populations.

Question 5

The Russian biologist G.F.Gause was one of the first to support the Lotka-Volterra equations by studying the competitive interactions of ________ species.

Accepted Answer

The answer of The Russian biologist G.F.Gause was one of...

Question 6

The portion of the fundamental niche that an organism actually exploits in the presence of competitors is called its ________ niche.

Accepted Answer

The answer of The portion of the fundamental niche that...

Question 7

The coexistence of competitors due to differences in the range of resources used or environmental tolerances is referred to as niche ________.

Accepted Answer

The answer of The coexistence of competitors due to differences...

Question 8

Changes in the outcome of competition over an environmental gradient are mediated by multiple environmental variables.

Accepted Answer

A) True 
 B)False

Question 9

The Lotka-Volterra competition models do not take into account variation between different environments.

Accepted Answer

A) True 
 B)False

Question 10

According to the competitive exclusion principle,the populations of two species that live in the same place and have exactly the same ecological requirements

Accepted Answer

A) can coexist at the same carrying capacity (K)as when each population is separate. 
B) can coexist but with the population of each species at half of the carrying capacity (K)as when each population is separate. 
C) can coexist but with the population of one species much higher than that of the other species. 
D) cannot coexist because one species will eventually drive the other to extinction. 
A) can coexist at the same carrying capacity (K)as when each population is separate. 
B) can coexist but with the population of each species at half of the carrying capacity (K)as when each population is separate. 
C) can coexist but with the population of one species much higher than that of the other species. 
D) cannot coexist because one species will eventually drive the other to extinction.

Question 11

The diagonal line that represents dN/dt = 0 in the graphical depiction of the Lotka-Volterra competitions equations is called

Accepted Answer

A) a competition coefficient. 
B) the carrying capacity. 
C) a zero-growth isocline. 
D) a competitive exclusion parameter. 
A) a competition coefficient. 
B) the carrying capacity. 
C) a zero-growth isocline. 
D) a competitive exclusion parameter.

Question 12

A taller plant shading those individuals below,and reducing available light,is referred to as

Accepted Answer

A) preemptive competition. 
B) consumption competition. 
C) overgrowth competition. 
D) territorial competition. 
A) preemptive competition. 
B) consumption competition. 
C) overgrowth competition. 
D) territorial competition.

Question 13

Two organisms using a portion of the same resource simultaneously is referred to as

Accepted Answer

A) niche overlap. 
B) competitive release. 
C) intraspecific competition. 
D) territoriality. 
A) niche overlap. 
B) competitive release. 
C) intraspecific competition. 
D) territoriality.

Question 14

Two or more organisms using a portion of the same resource simultaneously is referred to as resource partitioning.

Accepted Answer

A) True 
 B)False

Question 15

Two bird species compete in the forest for the same seeds.If α = 0.75 and β = 0.25,then

Accepted Answer

A) the rate of seed consumption is the same for both species. 
B) the environment can supply both species since the sum of competition coefficients equals 1. 
C) species 1 "wins" and will outcompete species 2. 
D) species 2 "wins" and will outcompete species 1. 
A) the rate of seed consumption is the same for both species. 
B) the environment can supply both species since the sum of competition coefficients equals 1. 
C) species 1 "wins" and will outcompete species 2. 
D) species 2 "wins" and will outcompete species 1.

Question 16

________ competition results when individuals of one species inhibit individuals of another by using up a shared resource.

Accepted Answer

The answer of ________ competition results when individuals of one...

Question 17

Paramecium aurelia has a higher rate of population growth and can tolerate a higher population density than P.caudatum.When both species were introduced into a tube containing a fixed amount of bacterial food,the populations of both species

Accepted Answer

A) thrived,even though they shared the same food supply. 
B) initially increased,after which P.aurelia thrived and P.caudatum died out. 
C) initially increased,after which P.caudatum thrived and P.aurelia died out. 
D) died out. 
A) thrived,even though they shared the same food supply. 
B) initially increased,after which P.aurelia thrived and P.caudatum died out. 
C) initially increased,after which P.caudatum thrived and P.aurelia died out. 
D) died out.

Question 18

The occupation of space by a sessile organism,such as a barnacle,that precludes the establishment or occupation by another species is referred to as

Accepted Answer

A) preemptive competition. 
B) consumption competition. 
C) overgrowth competition. 
D) encounter competition. 
A) preemptive competition. 
B) consumption competition. 
C) overgrowth competition. 
D) encounter competition.

Question 19

The portion of potential resources and conditions that an organism actually exploits as a result of interactions with other species is its

Accepted Answer

A) home range. 
B) territory. 
C) realized niche. 
D) fundamental niche. 
A) home range. 
B) territory. 
C) realized niche. 
D) fundamental niche.

Question 20

Laboratory studies have confirmed that two different species can coexist while using the same resource.

Accepted Answer

A) True 
 B)False

Exam 14: Interspecific Competition

Encounter competition results from the behavioral exclusion of some individuals by others from a specific space that is defended.

Which of the following is a nonresource (or nonconsumable resource)that can influence the outcome of competition among plant species?

Periods of drought or extreme environmental conditions may depress the ________ of a species below its carrying capacity (K).

Demonstrating the occurrence of interspecific competition during a field study is problematic for all of the following reasons,except

The Russian biologist G.F.Gause was one of the first to support the Lotka-Volterra equations by studying the competitive interactions of ________ species.

The portion of the fundamental niche that an organism actually exploits in the presence of competitors is called its ________ niche.

The coexistence of competitors due to differences in the range of resources used or environmental tolerances is referred to as niche ________.

Changes in the outcome of competition over an environmental gradient are mediated by multiple environmental variables.

The Lotka-Volterra competition models do not take into account variation between different environments.

According to the competitive exclusion principle,the populations of two species that live in the same place and have exactly the same ecological requirements

The diagonal line that represents dN/dt = 0 in the graphical depiction of the Lotka-Volterra competitions equations is called

A taller plant shading those individuals below,and reducing available light,is referred to as

Two organisms using a portion of the same resource simultaneously is referred to as

Two or more organisms using a portion of the same resource simultaneously is referred to as resource partitioning.

Two bird species compete in the forest for the same seeds.If α = 0.75 and β = 0.25,then

________ competition results when individuals of one species inhibit individuals of another by using up a shared resource.

Paramecium aurelia has a higher rate of population growth and can tolerate a higher population density than P.caudatum.When both species were introduced into a tube containing a fixed amount of bacterial food,the populations of both species

The occupation of space by a sessile organism,such as a barnacle,that precludes the establishment or occupation by another species is referred to as

The portion of potential resources and conditions that an organism actually exploits as a result of interactions with other species is its

Laboratory studies have confirmed that two different species can coexist while using the same resource.

The Nature of Ecology

Climate

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Intraspecific Population Regulation

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Species Interactions,population Dynamics,and Natural Selection

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Parasitism and Mutualism

Community Structure

Factors Influencing the Structure of Communities

Community Dynamics

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Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

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Large-Scale Patterns of Biological Diversity

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