Question 1

In Kathleen Keeler's cost-benefit model of mutualism,the condition for persistence of mutualists is pwmw + qwmu > wnm.The parameters p and q represent the

Accepted Answer

A) cost and benefit of the mutualism. 
B) fitness of successful and unsuccessful mutualists. 
C) frequency of "mutualist" and "nonmutualist" alleles in the population. 
D) proportion of successful and unsuccessful mutualists in the population. 
E) amount of herbivore protection provided by ant and non-ant defenses. 
A) cost and benefit of the mutualism. 
B) fitness of successful and unsuccessful mutualists. 
C) frequency of "mutualist" and "nonmutualist" alleles in the population. 
D) proportion of successful and unsuccessful mutualists in the population. 
E) amount of herbivore protection provided by ant and non-ant defenses.

Question 2

An interaction between individuals of different species that benefit both partners is called

Accepted Answer

A) commensalism. 
B) predation. 
C) exploitation. 
D) mutualism. 
E) ammensalism. 
A) commensalism. 
B) predation. 
C) exploitation. 
D) mutualism. 
E) ammensalism.

Question 3

In experiments with the prairie grass Andropogon,root:shoot ratios proved to be

Accepted Answer

A) higher in plants grown in poor soils. 
B) lower in plants grown in poor soils. 
C) equal in plants grown in poor and rich soils. 
D) higher in plants grown with mycorrhizae. 
E) equal in plants grown with and without mycorrhizae. 
A) higher in plants grown in poor soils. 
B) lower in plants grown in poor soils. 
C) equal in plants grown in poor and rich soils. 
D) higher in plants grown with mycorrhizae. 
E) equal in plants grown with and without mycorrhizae.

Question 4

Which of the following results,from research conducted by Nancy Johnson on big blue stem grass,suggested that mycorrhizal plants had greater access to nutrients?

Accepted Answer

A) root:shoot ratios were significantly lower in plants with mycorrhizae 
B) root:shoot ratios were significantly higher in plants with mycorrhizae 
C) root:shoot ratios were equal in plants with and without mycorrhizae 
D) root:shoot ratios were highest in treatments without nitrogen supplements 
E) root:shoot ratios were lowest in the treatment with nitrogen supplements 
A) root:shoot ratios were significantly lower in plants with mycorrhizae 
B) root:shoot ratios were significantly higher in plants with mycorrhizae 
C) root:shoot ratios were equal in plants with and without mycorrhizae 
D) root:shoot ratios were highest in treatments without nitrogen supplements 
E) root:shoot ratios were lowest in the treatment with nitrogen supplements

Question 5

The major benefit obtained by aspen sunflower,Helianthella quinquenervis,from its ant mutualists is

Accepted Answer

A) reduced losses of seeds to seed predators. 
B) reduced loss of leaf tissue to herbivorous insects. 
C) more efficient extraction of soil nutrients. 
D) more rapid growth early in the growing season. 
E) improved attraction of pollinators. 
A) reduced losses of seeds to seed predators. 
B) reduced loss of leaf tissue to herbivorous insects. 
C) more efficient extraction of soil nutrients. 
D) more rapid growth early in the growing season. 
E) improved attraction of pollinators.

Question 6

The presence of ant mutualists on bullshorn acacia reduces herbivore attack and increases acacia growth rate,but has little effect on acacia mortality rate.

Accepted Answer

A) True 
 B)False

Question 7

The two most common types of mycorrhizal fungi are ___________ and ____________.

Accepted Answer

arbuscular

Question 8

A calculated range of values that we estimate contains the true mean of a population with a known degree of certainty is called a

Accepted Answer

A) standard error. 
B) standard deviation. 
C) median. 
D) Students t-value. 
E) confidence interval. 
A) standard error. 
B) standard deviation. 
C) median. 
D) Students t-value. 
E) confidence interval.

Question 9

Mycorrhizal fungi acquire _________ from their plant partners.

Accepted Answer

A) sugars 
B) soil nutrients 
C) proteins and lipids 
D) growth hormones 
E) protection from consumers 
A) sugars 
B) soil nutrients 
C) proteins and lipids 
D) growth hormones 
E) protection from consumers

In Kathleen Keeler's cost-benefit model of mutualism,the condition for persistence of mutualists is pw_mw + qw_mu > w_nm.The parameters p and q represent the

An interaction between individuals of different species that benefit both partners is called

In experiments with the prairie grass Andropogon,root:shoot ratios proved to be

Which of the following results,from research conducted by Nancy Johnson on big blue stem grass,suggested that mycorrhizal plants had greater access to nutrients?

The major benefit obtained by aspen sunflower,Helianthella quinquenervis,from its ant mutualists is

The presence of ant mutualists on bullshorn acacia reduces herbivore attack and increases acacia growth rate,but has little effect on acacia mortality rate.

The two most common types of mycorrhizal fungi are _ and __.

A calculated range of values that we estimate contains the true mean of a population with a known degree of certainty is called a

Mycorrhizal fungi acquire _________ from their plant partners.

Introduction to Ecology: Historical Foundations and Developing Frontiers

Life on Land

Life in Water

Population Genetics and Natural Selection

Temperature Relations

Water Relations

Energy and Nutrient Relations

Social Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Exploitative Interactions: Predation, herbivory, parasitism, and Disease

Species Abundance and Diversity

Species Interactions and Community Structure

Primary Production and Energy Flow

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

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Exam 15: Mutualism

In Kathleen Keeler's cost-benefit model of mutualism,the condition for persistence of mutualists is pwmw + qwmu > wnm.The parameters p and q represent the

An interaction between individuals of different species that benefit both partners is called

In experiments with the prairie grass Andropogon,root:shoot ratios proved to be

Which of the following results,from research conducted by Nancy Johnson on big blue stem grass,suggested that mycorrhizal plants had greater access to nutrients?

The major benefit obtained by aspen sunflower,Helianthella quinquenervis,from its ant mutualists is

The presence of ant mutualists on bullshorn acacia reduces herbivore attack and increases acacia growth rate,but has little effect on acacia mortality rate.

The two most common types of mycorrhizal fungi are ___________ and ____________.

A calculated range of values that we estimate contains the true mean of a population with a known degree of certainty is called a

Mycorrhizal fungi acquire _________ from their plant partners.

Introduction to Ecology: Historical Foundations and Developing Frontiers

Life on Land

Life in Water

Population Genetics and Natural Selection

Temperature Relations

Water Relations

Energy and Nutrient Relations

Social Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Exploitative Interactions: Predation, herbivory, parasitism, and Disease

Species Abundance and Diversity

Species Interactions and Community Structure

Primary Production and Energy Flow

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters

In Kathleen Keeler's cost-benefit model of mutualism,the condition for persistence of mutualists is pw_mw + qw_mu > w_nm.The parameters p and q represent the

The two most common types of mycorrhizal fungi are _ and __.