Question 1

In an area with high soil nutrient availability,mycorrhizal fungi are

Accepted Answer

A) commensal. 
B) competitive. 
C) parasitic. 
D) neutral. 
A) commensal. 
B) competitive. 
C) parasitic. 
D) neutral.

Question 2

When one species feeds on another prey species,typically killing it,the relationship between the two interacting species is referred to as ________.

Accepted Answer

The answer of When one species feeds on another prey...

Question 3

The relationship between nectar-producing flowers and nectar-feeding birds is a mutually beneficial interaction.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following has the strongest impact on species 1 population size? N₂ =

Accepted Answer

A) 0) 
B) 250. 
C) 500. 
D) 750. 
A) 0) 
B) 250. 
C) 500. 
D) 750.

Question 5

In comparison to desert habitats,urban landscapes on average have a

Accepted Answer

A) higher number of bird species. 
B) lower number of bird species. 
C) similar number of bird species. 
D) the same type of bird species. 
A) higher number of bird species. 
B) lower number of bird species. 
C) similar number of bird species. 
D) the same type of bird species.

Question 6

When the relationship between two interacting species is detrimental to the populations of both species,the interaction is referred to as

Accepted Answer

A) parasitism. 
B) mutualism. 
C) competition. 
D) amensalism. 
A) parasitism. 
B) mutualism. 
C) competition. 
D) amensalism.

Question 7

Parasitoidism is a form of mutualism.

Accepted Answer

A) True 
 B)False

Question 8

When each of two species benefits from their interaction,the relationship is referred to as ________.

Accepted Answer

The answer of When each of two species benefits from...

Question 9

In a parasitic relationship between two species,the host species usually dies.

Accepted Answer

A) True 
 B)False

Question 10

An ecological niche is typically ________ dimension/s.

Accepted Answer

A) one 
B) two 
C) three 
D) an unspecified number of 
A) one 
B) two 
C) three 
D) an unspecified number of

Question 11

An organism's realized niche is always smaller than its fundamental niche.

Accepted Answer

A) True 
 B)False

Question 12

The red line in the figure (the furthest to the right)represents

Accepted Answer

A) low-toxicity Taricha individuals. 
B) high-toxicity Taricha individuals. 
C) highly vulnerable garter snake population. 
D) highly resistant garter snake population. 
A) low-toxicity Taricha individuals. 
B) high-toxicity Taricha individuals. 
C) highly vulnerable garter snake population. 
D) highly resistant garter snake population.

Question 13

The length of a butterfly tongue perfectly matches the nectar tube of a flower it pollinates.This is an example of

Accepted Answer

A) competition. 
B) amensalism. 
C) phenotypic plasticity. 
D) coevolution. 
A) competition. 
B) amensalism. 
C) phenotypic plasticity. 
D) coevolution.

Question 14

The process whereby one species gives rise to several others that exploit different features of the environment is known as

Accepted Answer

A) exponential growth. 
B) coevolution. 
C) adaptive radiation. 
D) competition. 
A) exponential growth. 
B) coevolution. 
C) adaptive radiation. 
D) competition.

Question 15

The interaction between two species usually influences all individuals within the respective populations equally.

Accepted Answer

A) True 
 B)False

Question 16

When a species of bird preys upon the seeds of a plant and favors the smallest seeds,

Accepted Answer

A) the prey species functions as an agent of natural selection on the predator. 
B) natural selection favors individual plants that produce the largest seeds. 
C) the plants compensate for their losses by producing proportionately more smaller seeds. 
D) the bird species is unaffected when directional selection favors plants that produce the largest seeds. 
A) the prey species functions as an agent of natural selection on the predator. 
B) natural selection favors individual plants that produce the largest seeds. 
C) the plants compensate for their losses by producing proportionately more smaller seeds. 
D) the bird species is unaffected when directional selection favors plants that produce the largest seeds.

Question 17

When the population size of a prey species increases,the birthrate of a predator species should also increase.

Accepted Answer

A) True 
 B)False

Question 18

What might happen over time if two bird species competed for the same seed resource and one preferred larger seeds while the other species preferred smaller ones?

Accepted Answer

A) Species would repeatedly switch between small and large seeds. 
B) Beak sizes might shift over time. 
C) Both species would die out via competition. 
D) Seed size will shift larger over time. 
A) Species would repeatedly switch between small and large seeds. 
B) Beak sizes might shift over time. 
C) Both species would die out via competition. 
D) Seed size will shift larger over time.

Question 19

The globeflower can host

Accepted Answer

A) at least six coexisting species. 
B) a single coevolved species. 
C) three different coexisting species. 
D) not a single insect species. 
A) at least six coexisting species. 
B) a single coevolved species. 
C) three different coexisting species. 
D) not a single insect species.

Question 20

On a dare,a student challenges another student to lick a California newt (Taricha torosa).From which population of newts should the student grab an individual to reduce his or her risk of a toxic dose?

Accepted Answer

A) from a population with no garter snakes 
B) from a population with a low abundance of garter snakes 
C) from a population with a medium abundance of garter snakes 
D) from a population with a high abundance of garter snakes 
A) from a population with no garter snakes 
B) from a population with a low abundance of garter snakes 
C) from a population with a medium abundance of garter snakes 
D) from a population with a high abundance of garter snakes

Exam 12: Species Interactions, population Dynamics, and Natural Selection

In an area with high soil nutrient availability,mycorrhizal fungi are

When one species feeds on another prey species,typically killing it,the relationship between the two interacting species is referred to as ________.

The relationship between nectar-producing flowers and nectar-feeding birds is a mutually beneficial interaction.

Which of the following has the strongest impact on species 1 population size? N₂ =

In comparison to desert habitats,urban landscapes on average have a

When the relationship between two interacting species is detrimental to the populations of both species,the interaction is referred to as

Parasitoidism is a form of mutualism.

When each of two species benefits from their interaction,the relationship is referred to as ________.

In a parasitic relationship between two species,the host species usually dies.

An ecological niche is typically ________ dimension/s.

An organism's realized niche is always smaller than its fundamental niche.

The red line in the figure (the furthest to the right)represents

The length of a butterfly tongue perfectly matches the nectar tube of a flower it pollinates.This is an example of

The process whereby one species gives rise to several others that exploit different features of the environment is known as

The interaction between two species usually influences all individuals within the respective populations equally.

When a species of bird preys upon the seeds of a plant and favors the smallest seeds,

When the population size of a prey species increases,the birthrate of a predator species should also increase.

What might happen over time if two bird species competed for the same seed resource and one preferred larger seeds while the other species preferred smaller ones?

The globeflower can host

On a dare,a student challenges another student to lick a California newt (Taricha torosa).From which population of newts should the student grab an individual to reduce his or her risk of a toxic dose?

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

Interspecific Competition

Predation

Parasitism and Mutualism

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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