Question 1

The species richness of high-latitude communities is ____ compared with that of low-latitude communities.

Accepted Answer

A)  low 
B)  high 
C)  no different 
D)  more dense 
E)  complex 
A)  low 
B)  high 
C)  no different 
D)  more dense 
E)  complex A

Question 2

Match between columns
                        Premises: environmental gradients that are more important on species survivability
communities that are not interdependent
stresses the interaction of members of a community.
views communities as 'super-organisms'
developed by Frederick Clements
developed by Henry Gleason

Accepted Answer

The Answer of organismic model and individualistic model is...

Question 3

Discuss coevolution as it relates to predator-prey interactions. Include a brief discussion of two specific examples.

Accepted Answer

Predation has resulted in a co-evolutionary "arms race"of predator strategies (more efficient ways to catch prey and prey strategies (better ways to escape the predator. 
An example of a predator strategy is increased speed of the brown pelican chasing fish. Some plants escape predators by physical characteristics such as spines and thorns which discourage herbivore predators.

Question 4

Which habitat would be expected to have the greatest species richness?

Accepted Answer

A)  an island 
B)  a polar habitat 
C)  an ecotone 
D)  an agricultural habitat 
E)  a mountain top 
A)  an island 
B)  a polar habitat 
C)  an ecotone 
D)  an agricultural habitat 
E)  a mountain top

Question 5

If you were to study all of the insect-eating birds in a forest, you would see that many birds eat insects, yet you may not see any evidence of competition. What is the most probable explanation?

Accepted Answer

A)  The birds have coevolved. 
B)  The birds are exhibiting resource partitioning. 
C)  The birds are exhibiting intraspecific competition only. 
D)  There is no keystone species in this community. 
E)  There is not enough species richness to see evidence of competition. 
A)  The birds have coevolved. 
B)  The birds are exhibiting resource partitioning. 
C)  The birds are exhibiting intraspecific competition only. 
D)  There is no keystone species in this community. 
E)  There is not enough species richness to see evidence of competition.

Question 6

Which of the following could be an example of a limiting resource?

Accepted Answer

A)  genetic mutations 
B)  plenty of nesting sites 
C)  amount of precipitation 
D)  abundant food 
E)  growth rate 
A)  genetic mutations 
B)  plenty of nesting sites 
C)  amount of precipitation 
D)  abundant food 
E)  growth rate

Question 7

Within a community, a dominant species may appropriate a disproportionate share of available resources, thus ____ other species.

Accepted Answer

A)  increasing competition with 
B)  increasing disease transmission with 
C)  undergrazing 
D)  outcompeting 
E)  decreasing disease transmission 
A)  increasing competition with 
B)  increasing disease transmission with 
C)  undergrazing 
D)  outcompeting 
E)  decreasing disease transmission

Question 8

Mycorrhizae are associations between:

Accepted Answer

A)  coral animals and dinoflagellates. 
B)  two types of insects. 
C)  fungi and plant roots. 
D)  wasps and orchids. 
E)  epiphytes and rainforest trees. 
A)  coral animals and dinoflagellates. 
B)  two types of insects. 
C)  fungi and plant roots. 
D)  wasps and orchids. 
E)  epiphytes and rainforest trees.

Question 9

Match between columns
                        Premises: change in species composition produced at ecotones
present in relatively small numbers in a community
may negatively impact specie richness
most common species in a community
regulate ecosystem function by nutrient cycling and resource availability.
crucial species in determining the nature of the entire community
based on food webs
may change the local environment
regulate ecosystem function by tropic interactions
also known as tropic cascades

Accepted Answer

The Answer of bottom-up processes and edge effect and keystone is...

Question 10

The current concept of a climax community states that forest communities:

Accepted Answer

A)  never reach a state of permanent equilibrium. 
B)  never are disturbed. 
C)  are determined solely by climate. 
D)  are not permanently affected by fires or floods. 
E)  are the inevitable end-point of succession. 
A)  never reach a state of permanent equilibrium. 
B)  never are disturbed. 
C)  are determined solely by climate. 
D)  are not permanently affected by fires or floods. 
E)  are the inevitable end-point of succession.

Question 11

The impact of a keystone species is proportionate to their abundance in an ecosystem.

Accepted Answer

A) True 
 B)False

Question 12

Describe the ongoing research concerning the relationship between species richness and community stability. What research supports or fails to support this relationship?

Accepted Answer

Concepts to Consider: The traditional vi

Question 13

A community consists of ____ species in a given area.

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  all 
A)  one 
B)  two 
C)  three 
D)  four 
E)  all

Question 14

An example of mutualism is:

Accepted Answer

A)  mycorrhizae and epiphytes. 
B)  epiphytes and tapeworms. 
C)  monarch and viceroy butterflies. 
D)  silverfish and army ants. 
E)  Rhizobium and legumes. 
A)  mycorrhizae and epiphytes. 
B)  epiphytes and tapeworms. 
C)  monarch and viceroy butterflies. 
D)  silverfish and army ants. 
E)  Rhizobium and legumes.

Question 15

Which country would be expected to have the greatest species richness per unit area?

Accepted Answer

A)  Japan 
B)  United States 
C)  Brazil 
D)  Canada 
E)  New Zealand 
A)  Japan 
B)  United States 
C)  Brazil 
D)  Canada 
E)  New Zealand

Question 16

Species richness is ____ when any one species enjoys a position of dominance.

Accepted Answer

A)  no different 
B)  more dense 
C)  reduced 
D)  increased 
E)  complex 
A)  no different 
B)  more dense 
C)  reduced 
D)  increased 
E)  complex

Question 17

Adaptations that exert a strong competitive force on a predator are the result of coevolution.

Accepted Answer

A) True 
 B)False

Question 18

In the studies by David Tilman of the University of Minnesota and John Downing of the University of Iowa, reported in the journal Nature in 1994, they established and monitored 207 plots of Minnesota grasslands for seven years. During the study period, Minnesota's worst drought in 50 years occurred (1987-1988). The ecologists found that those plots with the greatest number of plant species lost ____ ground cover, as measured by dry weight, and recovered faster than species-poor plots.

Accepted Answer

A)  less 
B)  more 
C)  no detectable 
D)  only deciduous 
E)  detectable 
A)  less 
B)  more 
C)  no detectable 
D)  only deciduous 
E)  detectable

Question 19

Habitat is best described as:

Accepted Answer

A)  the local environment in which a species lives. 
B)  what a species eats. 
C)  what competes with a species. 
D)  the abiotic components of a species' environment. 
E)  the totality of adaptations by a species to its environment. 
A)  the local environment in which a species lives. 
B)  what a species eats. 
C)  what competes with a species. 
D)  the abiotic components of a species' environment. 
E)  the totality of adaptations by a species to its environment.

Question 20

An organism's role within the structure and function of a particular community is its:

Accepted Answer

A)  habitat. 
B)  trophic level. 
C)  population. 
D)  ecological niche. 
E)  competition. 
A)  habitat. 
B)  trophic level. 
C)  population. 
D)  ecological niche. 
E)  competition.

Exam 54: Community Ecology

The species richness of high-latitude communities is ____ compared with that of low-latitude communities.

Discuss coevolution as it relates to predator-prey interactions. Include a brief discussion of two specific examples.

Which habitat would be expected to have the greatest species richness?

If you were to study all of the insect-eating birds in a forest, you would see that many birds eat insects, yet you may not see any evidence of competition. What is the most probable explanation?

Which of the following could be an example of a limiting resource?

Within a community, a dominant species may appropriate a disproportionate share of available resources, thus ____ other species.

Mycorrhizae are associations between:

The current concept of a climax community states that forest communities:

The impact of a keystone species is proportionate to their abundance in an ecosystem.

Describe the ongoing research concerning the relationship between species richness and community stability. What research supports or fails to support this relationship?

A community consists of ____ species in a given area.

An example of mutualism is:

Which country would be expected to have the greatest species richness per unit area?

Species richness is ____ when any one species enjoys a position of dominance.

Adaptations that exert a strong competitive force on a predator are the result of coevolution.

Habitat is best described as:

An organism's role within the structure and function of a particular community is its:

A View of Life

Atoms and Molecules the Chemical Basis of Life

The Chemistry of Life Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp Energy-Releasing Pathways

Photosynthesis Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure Growth and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function an Introduction

Protection Support and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology Population Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

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