Question 1

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

Accepted Answer

A) True 
 B)False  False

Question 2

MATCHING
a.restricts ecological niche species
d.finding common patterns and processes within the community
b.local environment in which a species lives
e.biological community and its abiotic environment
c.species' ecological role within the structure and function of a community
-limiting resource

Accepted Answer

A

Question 3

Keystone species:

Accepted Answer

A)  are always symbionts. 
B)  are typically not the most abundant species in the community. 
C)  illustrate secondary succession. 
D)  always form the base of a food chain. 
E)  are only found in tropical communities. 
A)  are always symbionts. 
B)  are typically not the most abundant species in the community. 
C)  illustrate secondary succession. 
D)  always form the base of a food chain. 
E)  are only found in tropical communities. B

Question 4

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 5

A(n) __________ has both biotic and abiotic components.

Accepted Answer

A)  population 
B)  community 
C)  ecosystem 
D)  species 
E)  genus 
A)  population 
B)  community 
C)  ecosystem 
D)  species 
E)  genus

Question 6

__________ begins in an area where there was a preexisting community and well-formed soil.

Accepted Answer

A)  Character displacement 
B)  Species richness 
C)  Primary succession 
D)  Secondary succession 
E)  Competitive exclusion 
A)  Character displacement 
B)  Species richness 
C)  Primary succession 
D)  Secondary succession 
E)  Competitive exclusion

Question 7

Which are the three main roles played by organisms in community life?

Accepted Answer

A)  producer, detritivore, decomposer 
B)  consumer, detritivore.decomposer 
C)  producer, consumer, decomposer 
D)  facilitator, decomposer, consumer 
E)  realized niche, fundamental niche, habitat 
A)  producer, detritivore, decomposer 
B)  consumer, detritivore.decomposer 
C)  producer, consumer, decomposer 
D)  facilitator, decomposer, consumer 
E)  realized niche, fundamental niche, habitat

Question 8

Species diversity is often very high in the region between two distinct communities, known as:

Accepted Answer

A)  an ecotone. 
B)  a secondary successional area. 
C)  a primary successional area. 
D)  a fundamental niche. 
E)  a realized niche. 
A)  an ecotone. 
B)  a secondary successional area. 
C)  a primary successional area. 
D)  a fundamental niche. 
E)  a realized niche.

Question 9

The idea that older, more stable habitats have greater species richness than habitats subjected to frequent, widespread disturbances is known as:

Accepted Answer

A)  natural selection. 
B)  the time hypothesis. 
C)  island biogeography. 
D)  the theory of community stability. 
E)  the disturbance hypothesis. 
A)  natural selection. 
B)  the time hypothesis. 
C)  island biogeography. 
D)  the theory of community stability. 
E)  the disturbance hypothesis.

Question 10

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 11

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 12

Pollution affects species diversity, thus the species richness of a highly polluted stream is __________ compared with that of a nearby pristine stream.

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

Question 13

MATCHING
a.restricts ecological niche species
d.finding common patterns and processes within the community
b.local environment in which a species lives
e.biological community and its abiotic environment
c.species' ecological role within the structure and function of a community
-ecosystem

Accepted Answer

The answer of MATCHING
a.restricts ecological niche species
d.finding common patterns and...

Question 14

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 15

The relationship between reef-building coral animals and zooxanthellae is classified as:

Accepted Answer

A)  mutualism. 
B)  commensalism. 
C)  Batesian mimicry. 
D)  parasitism. 
E)  character displacement. 
A)  mutualism. 
B)  commensalism. 
C)  Batesian mimicry. 
D)  parasitism. 
E)  character displacement.

Question 16

Species richness is a measure of both the number of species and the relative importance of each species based on its abundance, productivity, or size.
____________________

Accepted Answer

A) True 
 B)False

Question 17

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 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

The orderly replacement of one community by another is known as:

Accepted Answer

A)  character displacement. 
B)  succession. 
C)  coevolution. 
D)  the edge effect. 
E)  competitive exclusion. 
A)  character displacement. 
B)  succession. 
C)  coevolution. 
D)  the edge effect. 
E)  competitive exclusion.

Question 20

Which habitat would most likely have the greatest species richness?

Accepted Answer

A)  prairie 
B)  savanna 
C)  tundra 
D)  temperate desert 
E)  tropical rain forest 
A)  prairie 
B)  savanna 
C)  tundra 
D)  temperate desert 
E)  tropical rain forest

Exam 54: Community Ecology

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

MATCHING a.restricts ecological niche species d.finding common patterns and processes within the community b.local environment in which a species lives e.biological community and its abiotic environment c.species' ecological role within the structure and function of a community -limiting resource

Keystone species:

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

A(n) __________ has both biotic and abiotic components.

__________ begins in an area where there was a preexisting community and well-formed soil.

Which are the three main roles played by organisms in community life?

Species diversity is often very high in the region between two distinct communities, known as:

The idea that older, more stable habitats have greater species richness than habitats subjected to frequent, widespread disturbances is known as:

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

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

Pollution affects species diversity, thus the species richness of a highly polluted stream is __________ compared with that of a nearby pristine stream.

MATCHING a.restricts ecological niche species d.finding common patterns and processes within the community b.local environment in which a species lives e.biological community and its abiotic environment c.species' ecological role within the structure and function of a community -ecosystem

Habitat is best described as:

The relationship between reef-building coral animals and zooxanthellae is classified as:

Species richness is a measure of both the number of species and the relative importance of each species based on its abundance, productivity, or size. ____________________

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

The orderly replacement of one community by another is known as:

Which habitat would most likely have the greatest species richness?

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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