Question 1

The bacteria in yogurt can colonize the human intestine and participate in a symbiotic relationship called ________.

Accepted Answer

gut-inhabi

Question 2

A praying mantis captures and devours many insects during its lifetime; the relationship between a mantis and the exploited species (for example,a grasshopper)is one of

Accepted Answer

A)  parasite/host. 
B)  pathogen/prey. 
C)  parasite/prey. 
D)  predator/prey. 
A)  parasite/host. 
B)  pathogen/prey. 
C)  parasite/prey. 
D)  predator/prey.

Question 3

Which of the following statements about communities is true?

Accepted Answer

A)  They usually have few species of organisms. 
B)  There can be complex interactions between the organisms that make up a community. 
C)  They are more abundant in temperate areas. 
D)  They are made up of mammal species only. 
A)  They usually have few species of organisms. 
B)  There can be complex interactions between the organisms that make up a community. 
C)  They are more abundant in temperate areas. 
D)  They are made up of mammal species only.

Question 4

Mutualistic relationships can have an effect on the distribution and abundance of the species involved.

Accepted Answer

A) True 
 B)False

Question 5

The release of a parasitic wasp in California helped control the infestation of scale insects on citrus trees.However,it also caused the near extinction of a different species of parasitic wasp.Should we consider this experiment an unqualified success?

Accepted Answer

A)  Yes; the scale insects are controlled, and the extinct wasp was not ecologically important. 
B)  Yes; as long as we get a result that helps humans, it does not matter what the effect is on other species. 
C)  No; the effect of the loss of the original species of wasp cannot be predicted and may be more significant than the benefits to the citrus tree crop. 
D)  No; the citrus tree population in California will now be able to rise to unmanageable numbers. 
A)  Yes; the scale insects are controlled, and the extinct wasp was not ecologically important. 
B)  Yes; as long as we get a result that helps humans, it does not matter what the effect is on other species. 
C)  No; the effect of the loss of the original species of wasp cannot be predicted and may be more significant than the benefits to the citrus tree crop. 
D)  No; the citrus tree population in California will now be able to rise to unmanageable numbers.

Question 6

A community often contains a species that never becomes dominant in terms of its density but,nevertheless,exerts a profound influence on the organization and dynamics of that community; these community members are known as ________ species.

Accepted Answer

The answer of A community often contains a species that...

Question 7

When two similar species inhabit the same area,they may evolve over time to become more different and

Accepted Answer

A)  drive the other species to extinction. 
B)  reduce direct competition. 
C)  use up the other species' resources. 
D)  reduce their genetic variation. 
A)  drive the other species to extinction. 
B)  reduce direct competition. 
C)  use up the other species' resources. 
D)  reduce their genetic variation.

Question 8

Succession has a major impact on the species makeup of a community at any given point in time.

Accepted Answer

A) True 
 B)False

Question 9

Exploitation occurs in many forms; those interactions that result in the immediate death and consumption of the prey are classified as ________.

Accepted Answer

The answer of Exploitation occurs in many forms; those interactions...

Question 10

In comparing Communities A and B below,the major difference between them is that they differ in

Accepted Answer

A)  species richness. 
B)  relative species abundance. 
C)  that Community A has more primary producers than does Community B. 
D)  that Community B has more primary producers than does Community A. 
A)  species richness. 
B)  relative species abundance. 
C)  that Community A has more primary producers than does Community B. 
D)  that Community B has more primary producers than does Community A.

Question 11

Which of the following is most likely to be an example of an induced response?

Accepted Answer

A)  bright colors on the wings of a toxic butterfly 
B)  spines on a cactus habitually exposed to grazing 
C)  brightly colored flowers on a rosebush 
D)  color patterns on a poisonous snake 
A)  bright colors on the wings of a toxic butterfly 
B)  spines on a cactus habitually exposed to grazing 
C)  brightly colored flowers on a rosebush 
D)  color patterns on a poisonous snake

Question 12

Which of the following statements about human-caused disturbances to communities is true?

Accepted Answer

A)  Human-caused disturbances are not important because they do not cause any long-term permanent changes. 
B)  When a community recovers from a human-caused disturbance, it returns to its pre-disturbance condition. 
C)  Some communities can recover from human-caused disturbances over a period of time. 
D)  All communities are able to recover from human-caused disturbances. 
A)  Human-caused disturbances are not important because they do not cause any long-term permanent changes. 
B)  When a community recovers from a human-caused disturbance, it returns to its pre-disturbance condition. 
C)  Some communities can recover from human-caused disturbances over a period of time. 
D)  All communities are able to recover from human-caused disturbances.

Question 13

Which of the following patterns represents the outcomes of a commensalistic relationship?

Accepted Answer

A)  +/- 
B)  +/+ 
C)  o/+ 
D)  -/- 
A)  +/- 
B)  +/+ 
C)  o/+ 
D)  -/-

Question 14

Female ducks frequently deposit fertile eggs in the nests of unattended neighboring ducks.These eggs hatch and are then reared by the foster parent.What term best describes this behavior?

Accepted Answer

A)  parasitism 
B)  behavioral mutualism 
C)  exploitative competition 
D)  nest mutualism 
A)  parasitism 
B)  behavioral mutualism 
C)  exploitative competition 
D)  nest mutualism

Question 15

Antibiotic therapy sometimes reduces the population of gut-inhabiting microorganisms.Bloating and diarrhea often follow until the populations reestablish themselves.This observation suggests that these microorganisms participate in a(n)________ relationship with humans.

Accepted Answer

A)  competitive 
B)  exploitative 
C)  mutualistic 
D)  pathogenic 
A)  competitive 
B)  exploitative 
C)  mutualistic 
D)  pathogenic

Question 16

During the past 35 million years,the climate of North America has experienced significant change.

Accepted Answer

A) True 
 B)False

Question 17

Anthropogenic,or human-caused,changes to ecological communities typically

Accepted Answer

A)  improve those habitats for other organisms. 
B)  cause long-term damage and reduce the complexity of existing communities. 
C)  do not influence the natural interactions between organisms. 
D)  generally increase the diversity of life on Earth. 
A)  improve those habitats for other organisms. 
B)  cause long-term damage and reduce the complexity of existing communities. 
C)  do not influence the natural interactions between organisms. 
D)  generally increase the diversity of life on Earth.

Question 18

In ________ competition,species compete indirectly for a shared resource,each reducing the amount available to the other competitor.

Accepted Answer

A)  exploitative 
B)  restrictive 
C)  interference 
D)  advantageous 
A)  exploitative 
B)  restrictive 
C)  interference 
D)  advantageous

Question 19

Every healthy human digestive system is home to countless microorganisms.In a normal digestive system,what type of relationship would you say this is?

Accepted Answer

A)  parasitic 
B)  mutualistic 
C)  competitive 
D)  pathological 
A)  parasitic 
B)  mutualistic 
C)  competitive 
D)  pathological

Question 20

Competition is an unavoidable consequence when two species whose ________ overlaps live in the same community.

Accepted Answer

The answer of Competition is an unavoidable consequence when two...

Exam 23: Ecological Communities

The bacteria in yogurt can colonize the human intestine and participate in a symbiotic relationship called ________.

A praying mantis captures and devours many insects during its lifetime; the relationship between a mantis and the exploited species (for example,a grasshopper)is one of

Which of the following statements about communities is true?

Mutualistic relationships can have an effect on the distribution and abundance of the species involved.

The release of a parasitic wasp in California helped control the infestation of scale insects on citrus trees.However,it also caused the near extinction of a different species of parasitic wasp.Should we consider this experiment an unqualified success?

A community often contains a species that never becomes dominant in terms of its density but,nevertheless,exerts a profound influence on the organization and dynamics of that community; these community members are known as ________ species.

When two similar species inhabit the same area,they may evolve over time to become more different and

Succession has a major impact on the species makeup of a community at any given point in time.

Exploitation occurs in many forms; those interactions that result in the immediate death and consumption of the prey are classified as ________.

In comparing Communities A and B below,the major difference between them is that they differ in

Which of the following is most likely to be an example of an induced response?

Which of the following statements about human-caused disturbances to communities is true?

Which of the following patterns represents the outcomes of a commensalistic relationship?

Female ducks frequently deposit fertile eggs in the nests of unattended neighboring ducks.These eggs hatch and are then reared by the foster parent.What term best describes this behavior?

Antibiotic therapy sometimes reduces the population of gut-inhabiting microorganisms.Bloating and diarrhea often follow until the populations reestablish themselves.This observation suggests that these microorganisms participate in a(n)________ relationship with humans.

During the past 35 million years,the climate of North America has experienced significant change.

Anthropogenic,or human-caused,changes to ecological communities typically

In ________ competition,species compete indirectly for a shared resource,each reducing the amount available to the other competitor.

Every healthy human digestive system is home to countless microorganisms.In a normal digestive system,what type of relationship would you say this is?

Competition is an unavoidable consequence when two species whose ________ overlaps live in the same community.

The Nature of Science and the Characteristics of Life

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photo Synthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

How Evolution Works

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecosystems

Global Change

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