Question 1

What is the outcome of these isoclines?

Accepted Answer

A)  Species 2 wins.
B)  If species 1 begins with a higher abundance,it wins.
C)  If species 2 begins with a higher abundance,it wins.
D)  Species 1 wins.

Question 2

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.

Question 3

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

Question 4

Competition typically

Accepted Answer

A)  only involves two closely related species.
B)  involves a predator and prey.
C)  is a complex interaction of biotic and abiotic factors.
D)  is random.

Question 5

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. C

Question 6

A shift in the morphology,behavior,or physiology of a species in response to resource competition is referred to as ________ displacement.

Accepted Answer

The answer of A shift in the morphology,behavior,or physiology of...

Question 7

The different chipmunk species correspond to the different tree species along an elevational gradient.This is likely because

Accepted Answer

A)  each chipmunk species depends on the specific tree species for habitat.
B)  lodgepole trees and lodgepole chipmunks prefer warmer temperatures.
C)  the fundamental niche of yellow-pine chipmunks is limited to middle elevation.
D)  several resource factors for both groups change with elevation.

Question 8

When a species expands its niche in response to the removal of a competitor,the species has experienced competitive ________.

Accepted Answer

The answer of When a species expands its niche in...

Question 9

What is a zero-growth isocline?

Accepted Answer

A)  when the population size of species 1 exceeds species 2
B)  the set of values where α = β
C)  the set of values of two population sizes where the growth rate is 0
D)  the set of values where the carrying capacity is reached for one of the two species

Question 10

Studying competition in the laboratory is more complex than studying competition in the field.

Accepted Answer

A) True 
 B)False

Question 11

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 12

Species A prefers a more dry habitat but grows in a wet habitat.Why might this be?

Accepted Answer

A)  Species B outcompetes A in the dry habitat.
B)  Species A's fundamental niche is restricted to a wet habitat.
C)  Species A requires large amounts of moisture to grow.
D)  Species B prefers a wet habitat. A

Question 13

Two bird species compete in the forest for the same seeds.If α = 0.75 and β = 0.25,then (assuming the same carrying capacity for both)

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.

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

Interspecific ________ occurs when the competition for space between two species influences access to food and nesting sites.

Accepted Answer

The answer of Interspecific ________ occurs when the competition for...

Question 16

According to the competitive ________ principle,two "complete competitors" cannot coexist.

Accepted Answer

The answer of According to the competitive ________ principle,two "complete...

Question 17

Various species of scavengers fighting over the carcass of a dead animal is referred to as

Accepted Answer

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

Question 18

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.

Question 19

One effect of decreasing wolf populations in North America is

Accepted Answer

A)  decreased deer populations.
B)  range expansion for coyotes.
C)  range retraction for elk.
D)  increased bear populations.

Question 20

Chemical interaction competition in plants is called ________.

Accepted Answer

The answer of Chemical interaction competition in plants is called...

Exam 13: Interspecific Competition

What is the outcome of these isoclines?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Competition typically

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

A shift in the morphology,behavior,or physiology of a species in response to resource competition is referred to as ________ displacement.

Correct AnswerverifiedShow Answer

The different chipmunk species correspond to the different tree species along an elevational gradient.This is likely because

Correct AnswerverifiedShow Answer

When a species expands its niche in response to the removal of a competitor,the species has experienced competitive ________.

Correct AnswerverifiedShow Answer

What is a zero-growth isocline?

Correct AnswerverifiedShow Answer

Studying competition in the laboratory is more complex than studying competition in the field.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Species A prefers a more dry habitat but grows in a wet habitat.Why might this be?

Correct AnswerverifiedA

Two bird species compete in the forest for the same seeds.If α = 0.75 and β = 0.25,then (assuming the same carrying capacity for both)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Interspecific ________ occurs when the competition for space between two species influences access to food and nesting sites.

Correct AnswerverifiedShow Answer

According to the competitive ________ principle,two "complete competitors" cannot coexist.

Correct AnswerverifiedShow Answer

Various species of scavengers fighting over the carcass of a dead animal is referred to as

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

One effect of decreasing wolf populations in North America is

Correct AnswerverifiedShow Answer

Chemical interaction competition in plants is called ________.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified