Question 1

Gause's experiments with Paramecium and Didinium showed

Accepted Answer

A)  extinction of the predator, followed by extinction of the prey, in all habitats. 
B)  coexistence of predator and prey at fairly constant population sizes, in all habitats. 
C)  coexistence of predator and prey, but with oscillating population sizes, in all habitats. 
D)  coexistence of predator and prey at fairly constant population sizes, but only in the presence of refuges and predator reservoirs. 
E)  coexistence of predator and prey with oscillating population sizes, but only in the presence of refuges and predator reservoirs. 
A)  extinction of the predator, followed by extinction of the prey, in all habitats. 
B)  coexistence of predator and prey at fairly constant population sizes, in all habitats. 
C)  coexistence of predator and prey, but with oscillating population sizes, in all habitats. 
D)  coexistence of predator and prey at fairly constant population sizes, but only in the presence of refuges and predator reservoirs. 
E)  coexistence of predator and prey with oscillating population sizes, but only in the presence of refuges and predator reservoirs.

Question 2

Periodical cicadas spend 13 or 17 years

Accepted Answer

A)  feeding in tree twigs before emerging as adults. 
B)  feeding on tree roots before emerging as adults. 
C)  as adults before laying eggs. 
D)  in a resistant, resting egg before hatching as larvae. 
E)  None of the choices are correct. 
A)  feeding in tree twigs before emerging as adults. 
B)  feeding on tree roots before emerging as adults. 
C)  as adults before laying eggs. 
D)  in a resistant, resting egg before hatching as larvae. 
E)  None of the choices are correct.

Question 3

Calculate standard error given:   mm,s = 6.2 mm,and n = 10.

Accepted Answer

A)  0.62 mm 
B)  0.88 mm 
C)  1.96 mm 
D)  9.06 mm 
E)  17.8 mm 
A)  0.62 mm 
B)  0.88 mm 
C)  1.96 mm 
D)  9.06 mm 
E)  17.8 mm

Question 4

__________ consume live plant material but do not usually kill plants.

Accepted Answer

A)  Predators 
B)  Pathogens 
C)  Herbivores 
D)  Parasites 
E)  Parasitoids 
A)  Predators 
B)  Pathogens 
C)  Herbivores 
D)  Parasites 
E)  Parasitoids

Question 5

The Lotka-Volterra predation model predicts that predators and prey,living together,will show

Accepted Answer

A)  oscillations in population size that increase in amplitude through time. 
B)  oscillations in population size that remain of constant amplitude through time. 
C)  oscillations in population size that decrease in amplitude through time. 
D)  oscillations, but only when outside forces such as climatic variation are also present. 
E)  steady equilibria in population sizes. 
A)  oscillations in population size that increase in amplitude through time. 
B)  oscillations in population size that remain of constant amplitude through time. 
C)  oscillations in population size that decrease in amplitude through time. 
D)  oscillations, but only when outside forces such as climatic variation are also present. 
E)  steady equilibria in population sizes.

Question 6

Bethel and Holmes demonstrated

Accepted Answer

A)  positive phototaxis in Acanthocephalans infected by amphipods. 
B)  negative phototaxis in Acanthocephalans infected by amphipods. 
C)  positive phototaxis in amphipods infected by Acanthocephalans. 
D)  negative phototaxis in amphipods infected by Acanthocephalans. 
E)  increased herbivory by amphipods infected by Acanthocephalans. 
A)  positive phototaxis in Acanthocephalans infected by amphipods. 
B)  negative phototaxis in Acanthocephalans infected by amphipods. 
C)  positive phototaxis in amphipods infected by Acanthocephalans. 
D)  negative phototaxis in amphipods infected by Acanthocephalans. 
E)  increased herbivory by amphipods infected by Acanthocephalans.

Question 7

Plagiorhynchus worms and Puccinia rusts are parasites that share the ability to change their host's behavior in way that

Accepted Answer

A)  increase the length of time they can survive in their hosts. 
B)  decrease their host's mortality rates. 
C)  increase their hosts reproduction, thereby increasing production of parasite-infected offspring. 
D)  increase the likelihood of their (the parasites') transmission to a new host. 
E)  decrease the hosts' vulnerability to other parasites. 
A)  increase the length of time they can survive in their hosts. 
B)  decrease their host's mortality rates. 
C)  increase their hosts reproduction, thereby increasing production of parasite-infected offspring. 
D)  increase the likelihood of their (the parasites') transmission to a new host. 
E)  decrease the hosts' vulnerability to other parasites.

Question 8

Which of the following is a correct graphical representation of the Lotka-Volterra predator-prey model?

Accepted Answer

A)  predator and prey numbers are plotted against time producing reciprocal oscillations in predator prey populations 
B)  predator numbers are plotted against prey numbers producing reciprocal oscillations in predator prey populations 
C)  predator and prey numbers are plotted against time producing an elliptical oscillation in predator prey numbers 
D)  predator numbers are plotted against prey numbers producing an elliptical oscillation in predator prey numbers 
E)  both predator and prey numbers are plotted against time producing reciprocal oscillations in predator prey populations and predator numbers are plotted against prey numbers producing an elliptical oscillation in predator prey numbers 
A)  predator and prey numbers are plotted against time producing reciprocal oscillations in predator prey populations 
B)  predator numbers are plotted against prey numbers producing reciprocal oscillations in predator prey populations 
C)  predator and prey numbers are plotted against time producing an elliptical oscillation in predator prey numbers 
D)  predator numbers are plotted against prey numbers producing an elliptical oscillation in predator prey numbers 
E)  both predator and prey numbers are plotted against time producing reciprocal oscillations in predator prey populations and predator numbers are plotted against prey numbers producing an elliptical oscillation in predator prey numbers

Gause's experiments with Paramecium and Didinium showed

Periodical cicadas spend 13 or 17 years

Calculate standard error given: mm,s = 6.2 mm,and n = 10.

__________ consume live plant material but do not usually kill plants.

The Lotka-Volterra predation model predicts that predators and prey,living together,will show

Bethel and Holmes demonstrated

Plagiorhynchus worms and Puccinia rusts are parasites that share the ability to change their host's behavior in way that

Which of the following is a correct graphical representation of the Lotka-Volterra predator-prey model?

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

Socail Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Mutualism

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 14: Exploitative Interactions Predation, herbivory, parasitism, and Disease

Gause's experiments with Paramecium and Didinium showed

Periodical cicadas spend 13 or 17 years

Calculate standard error given: mm,s = 6.2 mm,and n = 10.

__________ consume live plant material but do not usually kill plants.

The Lotka-Volterra predation model predicts that predators and prey,living together,will show

Bethel and Holmes demonstrated

Plagiorhynchus worms and Puccinia rusts are parasites that share the ability to change their host's behavior in way that

Which of the following is a correct graphical representation of the Lotka-Volterra predator-prey model?

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

Socail Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Mutualism

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