Question 1

When populations of antelopes and cheetahs coexist, which population changes are likely to occur due to natural selection?

Accepted Answer

First, the antelope population may decli

Question 2

A community in which many species are involved in a food web is ____.

Accepted Answer

A)  more fragile since organisms have more than a single food source 
B)  more fragile since organisms have only a single food source 
C)  more stable since organisms have more than a single food source 
D)  more stable since organisms have only a single food source 
E)  most prone to damage from human interference 
A)  more fragile since organisms have more than a single food source 
B)  more fragile since organisms have only a single food source 
C)  more stable since organisms have more than a single food source 
D)  more stable since organisms have only a single food source 
E)  most prone to damage from human interference

Question 3

Which statement best describes parasitism?

Accepted Answer

A)  A parasite is harmful to the host. 
B)  A parasite provides nutrients for the host. 
C)  A parasite does not harm the host. 
D)  A parasite does not receive any benefits from the host. 
E)  A parasite always kills its host. 
A)  A parasite is harmful to the host. 
B)  A parasite provides nutrients for the host. 
C)  A parasite does not harm the host. 
D)  A parasite does not receive any benefits from the host. 
E)  A parasite always kills its host.

Question 4

Match between columns
                        Premises: one population obtains energy from plants; plants are negatively affected
one population benefits from the host; the host is unaffected
two populations lose access to some resources
one population obtains energy from animals; animals are killed
one population obtains energy from a host; the host is injured or killed
both populations in the relationship benefit

Accepted Answer

The Answer of herbivory and mutualism and parasitism and commensalism is...

Question 5

What causes a disclimax community?

Accepted Answer

A)  primary succession 
B)  secondary succession 
C)  facilitation 
D)  inhibition 
E)  disturbance inhibiting successional change 
A)  primary succession 
B)  secondary succession 
C)  facilitation 
D)  inhibition 
E)  disturbance inhibiting successional change

Question 6

Which event can be followed by primary succession?

Accepted Answer

A)  a landslide 
B)  storm 
C)  a fire 
D)  a volcanic eruption 
E)  logging 
A)  a landslide 
B)  storm 
C)  a fire 
D)  a volcanic eruption 
E)  logging

Question 7

In a study examining the effects of disturbances and recruitment on the growth of coral in a portion of the Great Barrier Reef, researchers concluded that changes in the coral colonies are ____.

Accepted Answer

A)  due to external factors only. 
B)  due to internal factors only. 
C)  due to both external and internal factors. 
D)  solely due to human interference. 
E)  not observable after disturbances 
A)  due to external factors only. 
B)  due to internal factors only. 
C)  due to both external and internal factors. 
D)  solely due to human interference. 
E)  not observable after disturbances

Question 8

Most analyses of population distributions along environmental gradients point toward the individualistic view of communities.

Accepted Answer

A) True 
 B)False

Question 9

Since all land-dwelling animals utilize atmospheric oxygen for respiration, does that make oxygen a limiting factor?

Accepted Answer

Even though all land-dwelling

Question 10

Thomas Bell and his colleagues studied bacterial species richness in isolated European beech treehole basins ("islands"). Their data showed that ______.

Accepted Answer

A)  island size affects beech tree populations 
B)  the number of bacterial species decreases with treehole volume 
C)  the number of bacterial species increases with treehole volume 
D)  large beech trees support higher bacteria populations than small beech trees 
E)  the species-area effects on bacterial species differs from species-area effects on animal and plant populations on true islands 
A)  island size affects beech tree populations 
B)  the number of bacterial species decreases with treehole volume 
C)  the number of bacterial species increases with treehole volume 
D)  large beech trees support higher bacteria populations than small beech trees 
E)  the species-area effects on bacterial species differs from species-area effects on animal and plant populations on true islands

Question 11

How has the grasshopper mouse coevolved to consume the Eleodes longicollis beetle?

Accepted Answer

A)  The grasshopper mouse avoids the undesirable secretions by burying the beetle's abdomen. 
B)  The grasshopper mouse uses cryptic coloration to sneak up on the beetle. 
C)  The grasshopper mouse is immune to the beetle's toxins. 
D)  The grasshopper mouse poisons the beetle first. 
E)  The grasshopper mouse uses heat detectors to easily locate the beetle. 
A)  The grasshopper mouse avoids the undesirable secretions by burying the beetle's abdomen. 
B)  The grasshopper mouse uses cryptic coloration to sneak up on the beetle. 
C)  The grasshopper mouse is immune to the beetle's toxins. 
D)  The grasshopper mouse poisons the beetle first. 
E)  The grasshopper mouse uses heat detectors to easily locate the beetle.

Question 12

Species richness on an island is determined by ____.

Accepted Answer

A)  distance from the mainland only 
B)  island size only 
C)  the type of species on the island only 
D)  distance from the mainland and island size 
E)  distance from the mainland and type of species on the island 
A)  distance from the mainland only 
B)  island size only 
C)  the type of species on the island only 
D)  distance from the mainland and island size 
E)  distance from the mainland and type of species on the island

Question 13

Which trophic level would be best represented by an herbivorous rabbit?

Accepted Answer

A)  decomposer 
B)  detritivore 
C)  primary consumer 
D)  primary producer 
E)  secondary consumer 
A)  decomposer 
B)  detritivore 
C)  primary consumer 
D)  primary producer 
E)  secondary consumer

Question 14

Allopatric populations that are morphologically ____ use ____ resources.

Accepted Answer

A)  similar; similar 
B)  similar; different 
C)  different; different 
D)  different; similar 
E)  unrelated; mimicry 
A)  similar; similar 
B)  similar; different 
C)  different; different 
D)  different; similar 
E)  unrelated; mimicry

Question 15

What was the overall effect of removing the predatory sea star Pisaster ochraceus from its food web?

Accepted Answer

A)  Species richness decreased rapidly. 
B)  Species richness increased rapidly. 
C)  Species richness stayed the same. 
D)  Another predator moved to the top position in the food web. 
E)  Mussel populations decreased. 
A)  Species richness decreased rapidly. 
B)  Species richness increased rapidly. 
C)  Species richness stayed the same. 
D)  Another predator moved to the top position in the food web. 
E)  Mussel populations decreased.

Question 16

A keystone species has a greater effect on community structure than its numbers might suggest.

Accepted Answer

A) True 
 B)False

Question 17

A milkweed plant discourages consumption by herbivores by ____.

Accepted Answer

A)  exuding a toxic sap 
B)  developing an appearance that mimics an undesirable plant 
C)  having hairy leaves 
D)  producing an undesirable scent 
E)  having thorns 
A)  exuding a toxic sap 
B)  developing an appearance that mimics an undesirable plant 
C)  having hairy leaves 
D)  producing an undesirable scent 
E)  having thorns

Question 18

Interference competition and exploitative competition are both examples of ____.

Accepted Answer

A)  coevolution 
B)  mimicry 
C)  interspecific competition 
D)  intraspecific competition 
E)  parasitism 
A)  coevolution 
B)  mimicry 
C)  interspecific competition 
D)  intraspecific competition 
E)  parasitism

Question 19

Why do frequent moderate intensity disturbances increase species richness?

Accepted Answer

According to the intermediate disturbanc

Question 20

What is the difference between a decomposer and a detritivore?

Accepted Answer

A decomposer is a small organism such as

Exam 53: Population Interactions and Community Ecology

When populations of antelopes and cheetahs coexist, which population changes are likely to occur due to natural selection?

A community in which many species are involved in a food web is ____.

Which statement best describes parasitism?

What causes a disclimax community?

Which event can be followed by primary succession?

In a study examining the effects of disturbances and recruitment on the growth of coral in a portion of the Great Barrier Reef, researchers concluded that changes in the coral colonies are ____.

Most analyses of population distributions along environmental gradients point toward the individualistic view of communities.

Since all land-dwelling animals utilize atmospheric oxygen for respiration, does that make oxygen a limiting factor?

Thomas Bell and his colleagues studied bacterial species richness in isolated European beech treehole basins ("islands"). Their data showed that ______.

How has the grasshopper mouse coevolved to consume the Eleodes longicollis beetle?

Species richness on an island is determined by ____.

Which trophic level would be best represented by an herbivorous rabbit?

Allopatric populations that are morphologically ____ use ____ resources.

What was the overall effect of removing the predatory sea star Pisaster ochraceus from its food web?

A keystone species has a greater effect on community structure than its numbers might suggest.

A milkweed plant discourages consumption by herbivores by ____.

Interference competition and exploitative competition are both examples of ____.

Why do frequent moderate intensity disturbances increase species richness?

What is the difference between a decomposer and a detritivore?

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

Allopatric populations that are morphologically use resources.