Question 1

The competitive exclusion principle states that

Accepted Answer

A) one species will always win out. 
B) two species cannot coexist unless they cooperate. 
C) two close competitors cannot coexist. 
D) one species will feed on another until it is extinct. 
A) one species will always win out. 
B) two species cannot coexist unless they cooperate. 
C) two close competitors cannot coexist. 
D) one species will feed on another until it is extinct.

Question 2

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 3

How can one grass species be dominant one year,while another is dominant a few years later and then the first becomes dominant again?

Accepted Answer

A) changes in precipitation across years 
B) Lotka-Volterra models predicting cycling 
C) competitive exclusion principle 
D) growth rate differences among the species 
A) changes in precipitation across years 
B) Lotka-Volterra models predicting cycling 
C) competitive exclusion principle 
D) growth rate differences among the species

Question 4

Competition has been regarded as a major force behind species divergence and specialization.

Accepted Answer

A) True 
 B)False

Question 5

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 6

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

Accepted Answer

The answer of Periods of drought or extreme environmental conditions...

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

Competition for one resource often influences the ability of an organism to access other resources.

Accepted Answer

A) True 
 B)False

Question 9

Typically species compete for

Accepted Answer

A) food. 
B) space. 
C) essential nutrients. 
D) multiple resources simultaneously. 
A) food. 
B) space. 
C) essential nutrients. 
D) multiple resources simultaneously.

Question 10

________ 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 11

Hiking up an elevational gradient,you notice different species of birds becoming more dominant the higher you go.This could be because

Accepted Answer

A) older birds prefer lower elevations. 
B) competitive abilities change along environmental gradients. 
C) of population cycling. 
D) there are more predators at higher elevation. 
A) older birds prefer lower elevations. 
B) competitive abilities change along environmental gradients. 
C) of population cycling. 
D) there are more predators at higher elevation.

Question 12

One way two competing species can coexist in the same area is via

Accepted Answer

A) having the same competition coefficient. 
B) zero-growth isoclines. 
C) competitive exclusion. 
D) niche differentiation. 
A) having the same competition coefficient. 
B) zero-growth isoclines. 
C) competitive exclusion. 
D) niche differentiation.

Question 13

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 14

Because of interspecific competition,species do not always occupy the part of their fundamental niche where conditions yield the highest growth rate,reproduction,or fitness.

Accepted Answer

A) True 
 B)False

Question 15

In the following formula,what is β? dN₂/dt = r2N₂(1 - (N₂ + βN₁)/K2)

Accepted Answer

A) competition coefficient 
B) growth rate 
C) carrying capacity 
D) population size 
A) competition coefficient 
B) growth rate 
C) carrying capacity 
D) population size

Question 16

The competitive exclusion principle assumes that the

Accepted Answer

A) competing species have different resource requirements. 
B) competing species have the same carrying capacity (K). 
C) environmental conditions remain constant. 
D) superior competing species will have a lower population growth rate than the inferior competitor. 
A) competing species have different resource requirements. 
B) competing species have the same carrying capacity (K). 
C) environmental conditions remain constant. 
D) superior competing species will have a lower population growth rate than the inferior competitor.

Question 17

Preemptive competition occurs primarily among mobile organisms,such as small mammals.

Accepted Answer

A) True 
 B)False

Question 18

Environmental variation can allow competitors to coexist where under constant conditions one would exclude the other.

Accepted Answer

A) True 
 B)False

Question 19

Chemicals released by plants to inhibit germination and establishment of other species is known as

Accepted Answer

A) consumption. 
B) allelopathy. 
C) toxicopathy. 
D) competitive exclusion. 
A) consumption. 
B) allelopathy. 
C) toxicopathy. 
D) competitive exclusion.

Question 20

Change in beak size over time in Darwin's finches is an example of

Accepted Answer

A) environmental gradient. 
B) fundamental niche. 
C) competitive exclusion. 
D) character displacement. 
A) environmental gradient. 
B) fundamental niche. 
C) competitive exclusion. 
D) character displacement.

Exam 13: Interspecific Competition

The competitive exclusion principle states that

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

How can one grass species be dominant one year,while another is dominant a few years later and then the first becomes dominant again?

Competition has been regarded as a major force behind species divergence and specialization.

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

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

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

Competition for one resource often influences the ability of an organism to access other resources.

Typically species compete for

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

Hiking up an elevational gradient,you notice different species of birds becoming more dominant the higher you go.This could be because

One way two competing species can coexist in the same area is via

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

Because of interspecific competition,species do not always occupy the part of their fundamental niche where conditions yield the highest growth rate,reproduction,or fitness.

In the following formula,what is β? dN₂/dt = r2N₂(1 - (N₂ + βN₁)/K2)

The competitive exclusion principle assumes that the

Preemptive competition occurs primarily among mobile organisms,such as small mammals.

Environmental variation can allow competitors to coexist where under constant conditions one would exclude the other.

Chemicals released by plants to inhibit germination and establishment of other species is known as

Change in beak size over time in Darwin's finches is an example of

The Nature of Ecology

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The Terrestrial Environment

Adaptation and Natural Selection

Plant Adaptations to the Environment

Animal Adaptations to the Environment

Properties of Populations

Population Growth

Life History

Intraspecific Population Regulation

Species Interactions, population Dynamics, and Natural Selection

Predation

Parasitism and Mutualism

Community Structure

Factors Influencing the Structure of Communities

Community Dynamics

Landscape Dynamics

Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

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Large-Scale Patterns of Biological Diversity

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