Question 1

An animal that feeds upon nectar is referred to as a(n)________.

Accepted Answer

The answer of An animal that feeds upon nectar is...

Question 2

________ transmission occurs when a parasite is transferred from one host to another without the involvement of an intermediate organism.

Accepted Answer

The answer of ________ transmission occurs when a parasite is...

Question 3

When infected by a parasite,an animal typically

Accepted Answer

A) grows more rapidly than a healthy individual. 
B) produces fewer offspring than a healthy individual. 
C) behaves less conspicuously than a healthy individual. 
D) is less likely to be preyed on than a healthy individual. 
A) grows more rapidly than a healthy individual. 
B) produces fewer offspring than a healthy individual. 
C) behaves less conspicuously than a healthy individual. 
D) is less likely to be preyed on than a healthy individual.

Question 4

Myrmechochores are ants that are attracted to the seeds of certain plants.

Accepted Answer

A) True 
 B)False

Question 5

The presence of a mutualist might allow what to happen in terms of population dynamics?

Accepted Answer

A) The species could surpass its carrying capacity. 
B) The growth rate would decrease. 
C) The competition coefficient would become negative. 
D) N would go to 0. 
A) The species could surpass its carrying capacity. 
B) The growth rate would decrease. 
C) The competition coefficient would become negative. 
D) N would go to 0.

Question 6

A lichen is an example of a commensalistic relationship between a fungus and an alga.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following best explains the figure?

Accepted Answer

A) Conspicuous behavior leads to high infection intensity. 
B) High intensity infection leads to more conspicuous behavior. 
C) There is no relationship between conspicuous behavior and infection intensity. 
D) Only infected individuals exhibit conspicuous behavior. 
A) Conspicuous behavior leads to high infection intensity. 
B) High intensity infection leads to more conspicuous behavior. 
C) There is no relationship between conspicuous behavior and infection intensity. 
D) Only infected individuals exhibit conspicuous behavior.

Question 8

Which of the following is an endoparasite?

Accepted Answer

A) flea 
B) tapeworm 
C) tick 
D) mosquito 
A) flea 
B) tapeworm 
C) tick 
D) mosquito

Question 9

Which of the following is a macroparasite?

Accepted Answer

A) virus 
B) bacterium 
C) tick 
D) protozoan 
A) virus 
B) bacterium 
C) tick 
D) protozoan

Question 10

The most debilitating external parasites of birds and mammals are spread by

Accepted Answer

A) a vector. 
B) an intermediate host. 
C) a definitive host. 
D) direct contact. 
A) a vector. 
B) an intermediate host. 
C) a definitive host. 
D) direct contact.

Question 11

The number of parasites per individual is relatively high in most individuals and low in a few individuals.

Accepted Answer

A) True 
 B)False

Question 12

The Lotka-Volterra models used for competition may also be used to describe the dynamics of a mutualism by replacing the competition coefficients with positive interaction coefficients.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is a potential response by a plant host to a parasite?

Accepted Answer

A) formation of a gall 
B) allelopathy 
C) increased production of lymphocytes 
D) more rapid growth of tissues 
A) formation of a gall 
B) allelopathy 
C) increased production of lymphocytes 
D) more rapid growth of tissues

Question 14

Which of the following transmission modes is available for plants?

Accepted Answer

A) direct 
B) intermediate vector 
C) multiple hosts and stages 
D) all of the above 
A) direct 
B) intermediate vector 
C) multiple hosts and stages 
D) all of the above

Question 15

A(n)________ lives on or within the host organism for some period of its life.

Accepted Answer

The answer of A(n)________ lives on or within the host...

Question 16

Parasites typically impact host survival but not reproduction.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is associated with the increased incidence of Lyme disease?

Accepted Answer

A) decreased tick population 
B) decreased deer population 
C) decreased white-footed mouse population 
D) decreased forest patch size 
A) decreased tick population 
B) decreased deer population 
C) decreased white-footed mouse population 
D) decreased forest patch size

Question 18

A lichen consists of a(n)________ and an alga (or,in some cases,a cyanobacterium).

Accepted Answer

The answer of A lichen consists of a(n)________ and an...

Question 19

How might ants on an acacia tree serve in a mutualistic relationship?

Accepted Answer

A) The ants fight off potential herbivores. 
B) The ants carry disease. 
C) The ants bring nitrogen to the tree. 
D) The ants bring sugar to the tree. 
A) The ants fight off potential herbivores. 
B) The ants carry disease. 
C) The ants bring nitrogen to the tree. 
D) The ants bring sugar to the tree.

Question 20

After infection occurs,the second line of defense for a host against a parasite,which is elicited when a foreign object,such as a virus or bacterium,enters the bloodstream,is referred to as a(n)________ response.

Accepted Answer

The answer of After infection occurs,the second line of defense...

Exam 15: Parasitism and Mutualism

An animal that feeds upon nectar is referred to as a(n)________.

________ transmission occurs when a parasite is transferred from one host to another without the involvement of an intermediate organism.

When infected by a parasite,an animal typically

Myrmechochores are ants that are attracted to the seeds of certain plants.

The presence of a mutualist might allow what to happen in terms of population dynamics?

A lichen is an example of a commensalistic relationship between a fungus and an alga.

Which of the following best explains the figure?

Which of the following is an endoparasite?

Which of the following is a macroparasite?

The most debilitating external parasites of birds and mammals are spread by

The number of parasites per individual is relatively high in most individuals and low in a few individuals.

The Lotka-Volterra models used for competition may also be used to describe the dynamics of a mutualism by replacing the competition coefficients with positive interaction coefficients.

Which of the following is a potential response by a plant host to a parasite?

Which of the following transmission modes is available for plants?

A(n)________ lives on or within the host organism for some period of its life.

Parasites typically impact host survival but not reproduction.

Which of the following is associated with the increased incidence of Lyme disease?

A lichen consists of a(n)________ and an alga (or,in some cases,a cyanobacterium).

How might ants on an acacia tree serve in a mutualistic relationship?

After infection occurs,the second line of defense for a host against a parasite,which is elicited when a foreign object,such as a virus or bacterium,enters the bloodstream,is referred to as a(n)________ response.

The Nature of Ecology

Climate

The Aquatic Environment

The Terrestrial Environment

Adaptation and Natural Selection

Plant Adaptations to the Environment

Animal Adaptations to the Environment

Properties of Populations

Population Growth

Life History

Intraspecific Population Regulation

Species Interactions, population Dynamics, and Natural Selection

Interspecific Competition

Predation

Community Structure

Factors Influencing the Structure of Communities

Community Dynamics

Landscape Dynamics

Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

Terrestrial Ecosystems

Aquatic Ecosystems

Coastal and Wetland Ecosystems

Large-Scale Patterns of Biological Diversity

The Ecology of Climate Change

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