Question 1

What is the 95% confidence interval for the Gila River sample of loach minnows given:   mm,s = 6.2 mm,n = 50,and critical value of t = 2.01.

Accepted Answer

A) 56.2 mm + 1.77 mm 
B) 56.2 mm $\pm$ 1.77 mm 
C) 56.2 mm - 2.26 mm 
D) 56.2 mm $\pm$ 0.25 mm 
E) 56.2 mm + 0.25 mm 
A) 56.2 mm + 1.77 mm 
B) 56.2 mm $\pm$ 1.77 mm 
C) 56.2 mm - 2.26 mm 
D) 56.2 mm $\pm$ 0.25 mm 
E) 56.2 mm + 0.25 mm

Question 2

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 3

The "unsuccessful mutualists" in Kathleen Keeler's cost-benefit model of mutualism are those that

Accepted Answer

A) give benefits to their partner,but fail to receive benefits in return. 
B) receive benefits from their partner,but fail to provide benefits in return. 
C) neither give benefits to their partner,nor receive them in return. 
D) fail to locate individuals of their mutualistic partner effectively. 
E) locate mutualistic partners,but fail to overcome their defenses against colonization. 
A) give benefits to their partner,but fail to receive benefits in return. 
B) receive benefits from their partner,but fail to provide benefits in return. 
C) neither give benefits to their partner,nor receive them in return. 
D) fail to locate individuals of their mutualistic partner effectively. 
E) locate mutualistic partners,but fail to overcome their defenses against colonization.

Question 4

Soil fertilization should favor mycorrhizal fungi that are

Accepted Answer

A) less aggressive at obtaining sugars from their plant hosts. 
B) more aggressive at obtaining sugars from their plant hosts. 
C) more efficient at extracting inorganic nutrients from soils. 
D) more efficient at extracting sugars from soils. 
E) more efficient at extracting inorganic nutrients from plant root exudates. 
A) less aggressive at obtaining sugars from their plant hosts. 
B) more aggressive at obtaining sugars from their plant hosts. 
C) more efficient at extracting inorganic nutrients from soils. 
D) more efficient at extracting sugars from soils. 
E) more efficient at extracting inorganic nutrients from plant root exudates.

Question 5

Which of the following statements is true regarding the control of coral over zooxanthellae?

Accepted Answer

A) Coral induces zooxanthellae to release organic compounds. 
B) Coral controls the rate of zooxanthellae population growth. 
C) Coral controls the population density of zooxanthellae. 
D) Coral promotes unbalanced growth in zooxanthellae. 
E) All of the choices are true. 
A) Coral induces zooxanthellae to release organic compounds. 
B) Coral controls the rate of zooxanthellae population growth. 
C) Coral controls the population density of zooxanthellae. 
D) Coral promotes unbalanced growth in zooxanthellae. 
E) All of the choices are true.

Question 6

Crabs and shrimp associated with corals protect their hosts from

Accepted Answer

A) being dislodged from the substrate by currents. 
B) predation by sea-stars. 
C) predation by fishes. 
D) attack by parasitic nematodes. 
E) infection by pathogenic bacteria. 
A) being dislodged from the substrate by currents. 
B) predation by sea-stars. 
C) predation by fishes. 
D) attack by parasitic nematodes. 
E) infection by pathogenic bacteria.

Question 7

Which aspects of the biology of zooxanthellae are controlled by their coral hosts?

Accepted Answer

A) their cell wall chemistry 
B) their population growth rate when free-living 
C) the release of photosynthetic products from their cells 
D) the rate at which they absorb sugars from their hosts 
E) their mortality rate 
A) their cell wall chemistry 
B) their population growth rate when free-living 
C) the release of photosynthetic products from their cells 
D) the rate at which they absorb sugars from their hosts 
E) their mortality rate

Question 8

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

Accepted Answer

arbuscular

Question 9

Which of the following organisms are dependent on mutualisms for their persistence?

Accepted Answer

A) reef-building corals 
B) bioluminescent fishes 
C) bumblebees and hummingbirds 
D) horses,elephants,and camels 
E) All of the choices are correct. 
A) reef-building corals 
B) bioluminescent fishes 
C) bumblebees and hummingbirds 
D) horses,elephants,and camels 
E) All of the choices are correct.

What is the 95% confidence interval for the Gila River sample of loach minnows given: mm,s = 6.2 mm,n = 50,and critical value of t = 2.01.

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 "unsuccessful mutualists" in Kathleen Keeler's cost-benefit model of mutualism are those that

Soil fertilization should favor mycorrhizal fungi that are

Which of the following statements is true regarding the control of coral over zooxanthellae?

Crabs and shrimp associated with corals protect their hosts from

Which aspects of the biology of zooxanthellae are controlled by their coral hosts?

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

Which of the following organisms are dependent on mutualisms for their persistence?

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

Exam 15: Mutualism

What is the 95% confidence interval for the Gila River sample of loach minnows given: mm,s = 6.2 mm,n = 50,and critical value of t = 2.01.

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 "unsuccessful mutualists" in Kathleen Keeler's cost-benefit model of mutualism are those that

Soil fertilization should favor mycorrhizal fungi that are

Which of the following statements is true regarding the control of coral over zooxanthellae?

Crabs and shrimp associated with corals protect their hosts from

Which aspects of the biology of zooxanthellae are controlled by their coral hosts?

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

Which of the following organisms are dependent on mutualisms for their persistence?

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

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