Question 1

Most species are intermediate between r-strategists and K-strategists,and tend to have a type II survivorship curve.

Accepted Answer

A) True 
 B)False  True

Question 2

All of the following statements about population distribution are true EXCEPT

Accepted Answer

A) population distribution is the pattern of dispersal of individuals across an area of interest. 
B) environmental conditions,such as climate and altitude,are often limiting factors of distribution. 
C) a population's distribution is calculated as the number of individuals per unit area. 
D) behavioral traits,such as territoriality,can affect the distribution pattern of a population. 
A) population distribution is the pattern of dispersal of individuals across an area of interest. 
B) environmental conditions,such as climate and altitude,are often limiting factors of distribution. 
C) a population's distribution is calculated as the number of individuals per unit area. 
D) behavioral traits,such as territoriality,can affect the distribution pattern of a population. C

Question 3

Which of the following circumstances would cause exponential growth to move into a logistic growth phase?

Accepted Answer

A) a reduction in the number of females within the population 
B) a large increase in the population over three generations 
C) the introduction of a non-native predator into the environment 
D) habitat alteration resulting in the conversion of 1,200 acres of forests into agricultural fields and housing developments 
E) All of these would cause exponential growth to move into logistic growth. 
A) a reduction in the number of females within the population 
B) a large increase in the population over three generations 
C) the introduction of a non-native predator into the environment 
D) habitat alteration resulting in the conversion of 1,200 acres of forests into agricultural fields and housing developments 
E) All of these would cause exponential growth to move into logistic growth. E

Question 4

If the members of a population are small in size,mature early,and have high parity and fecundity,they are

Accepted Answer

A) K-strategists. 
B) r-strategists. 
C) neither K-strategists nor r-strategists,but have characteristics of both. 
A) K-strategists. 
B) r-strategists. 
C) neither K-strategists nor r-strategists,but have characteristics of both.

Question 5

The sequence of decreased death rate followed by a decrease in birthrate is called

Accepted Answer

A) environmental resistance. 
B) a limiting factor. 
C) doubling time coefficient. 
D) demographic transition. 
E) replacement reproduction. 
A) environmental resistance. 
B) a limiting factor. 
C) doubling time coefficient. 
D) demographic transition. 
E) replacement reproduction.

Question 6

Farmers sprayed litchi trees to suppress populations of scale insects.However,the spray also killed populations of a predatory lacewing that controlled the scales.Soon the spraying did no good,and the damage to the litchi from the scales was greater than before spraying had occurred.Few predatory lacewings exist in the trees now because

Accepted Answer

A) they,too,are insects so they are r-selected. 
B) the scale insect was K-selected and the high number of young included a resistant strain,while the predator was r-selected and will take longer to produce a resistant variety. 
C) the predator was r-selected and was therefore more susceptible to the spray. 
D) the scale insect was r-selected and the high number of young included a resistant strain; the predator was K-selected and will take longer to produce a resistant variety. 
A) they,too,are insects so they are r-selected. 
B) the scale insect was K-selected and the high number of young included a resistant strain,while the predator was r-selected and will take longer to produce a resistant variety. 
C) the predator was r-selected and was therefore more susceptible to the spray. 
D) the scale insect was r-selected and the high number of young included a resistant strain; the predator was K-selected and will take longer to produce a resistant variety.

Question 7

In trying to limit the growth of a pest,you will have more success if you can reduce the carrying capacity of the environment rather than reduce the population size of the pest.

Accepted Answer

A) True 
 B)False

Question 8

The population growth rate is negative when

Accepted Answer

A) birthrate is greater than death rate. 
B) death rate is greater than birthrate. 
C) all couples are married but average fewer than two children apiece. 
D) a country becomes poorer,because it is related to economic growth. 
E) better health care reduces the death rate and increases survivorship of newborns. 
A) birthrate is greater than death rate. 
B) death rate is greater than birthrate. 
C) all couples are married but average fewer than two children apiece. 
D) a country becomes poorer,because it is related to economic growth. 
E) better health care reduces the death rate and increases survivorship of newborns.

Question 9

How is environmental impact measured in a population?

Accepted Answer

A) population size and resource consumption 
B) population size and resource production 
C) number of individuals dying each generation plus birthrates 
D) All of these are used to measure environmental impact. 
E) None of these are used to measure environmental impact. 
A) population size and resource consumption 
B) population size and resource production 
C) number of individuals dying each generation plus birthrates 
D) All of these are used to measure environmental impact. 
E) None of these are used to measure environmental impact.

Question 10

A(n)________ consists of all the populations of multiple species interacting in a designated region.

Accepted Answer

A) ecosystem 
B) community 
C) biosphere 
D) None of the choices are correct. 
A) ecosystem 
B) community 
C) biosphere 
D) None of the choices are correct.

Question 11

Density-independent factors which play a role in regulating population size in nature include

Accepted Answer

A) weather. 
B) natural disasters. 
C) geographical barriers. 
D) All of the choices are correct. 
A) weather. 
B) natural disasters. 
C) geographical barriers. 
D) All of the choices are correct.

Question 12

In the logistic growth curve formula,when N is very large,(K-N)/N is almost equal to 0,which results in

Accepted Answer

A) the population growing as fast as it can,or r(N). 
B) the population growth slowing to zero. 
C) the population exceeding carrying capacity; more are dying due to starvation than are born. 
D) the population going extinct. 
E) You can't tell without knowing the value of r (rate of reproduction). 
A) the population growing as fast as it can,or r(N). 
B) the population growth slowing to zero. 
C) the population exceeding carrying capacity; more are dying due to starvation than are born. 
D) the population going extinct. 
E) You can't tell without knowing the value of r (rate of reproduction).

Question 13

A population in which death rates are higher than birth rates,and the prereproductive group is smaller than the reproductive group,is best represented by an age structure diagram with a(n)________-shape.

Accepted Answer

A) bell 
B) urn 
C) pyramid 
D) S 
E) J 
A) bell 
B) urn 
C) pyramid 
D) S 
E) J

Question 14

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth.Identify the labeled phases,"A" and "B," and briefly explain what occurs during these phases.

Accepted Answer

Answers may vary.This is an exponential

Question 15

Population size levels off at the ________ of an environment.

Accepted Answer

A) population growth 
B) biotic potential 
C) environmental resistance 
D) carrying capacity 
A) population growth 
B) biotic potential 
C) environmental resistance 
D) carrying capacity

Question 16

Only the LDCs will be experiencing overpopulation growth in the near future.

Accepted Answer

A) True 
 B)False

Question 17

When discussing population features,a cohort is described as

Accepted Answer

A) all the individuals in a population born at the same time. 
B) all individuals living in the same habitat. 
C) all the different species in a community. 
D) all the organisms interacting in the ecosystem. 
E) All of the choices are correct. 
A) all the individuals in a population born at the same time. 
B) all individuals living in the same habitat. 
C) all the different species in a community. 
D) all the organisms interacting in the ecosystem. 
E) All of the choices are correct.

Question 18

Since the population of the LDCs is still growing at a significant rate,one would correctly assume that the LDCs consume a much larger proportion of the Earth's resources.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following lifestyle changes would have the greatest impact on reducing an individual's environmental impact?

Accepted Answer

A) Reducing your meat consumption to once or twice a week. 
B) Buying a more fuel-efficient vehicle and only using it when you are taking long trips instead of traveling locally. 
C) Downsizing and moving into a smaller house. 
D) Reducing the number of children in your household to reach a zero population growth rate. 
E) Waiting until later in life to have children and only having one per couple. 
A) Reducing your meat consumption to once or twice a week. 
B) Buying a more fuel-efficient vehicle and only using it when you are taking long trips instead of traveling locally. 
C) Downsizing and moving into a smaller house. 
D) Reducing the number of children in your household to reach a zero population growth rate. 
E) Waiting until later in life to have children and only having one per couple.

Question 20

Researchers have discovered that there is a small remnant population of endangered bluegrass left in a small prairie plot outside of Kansas City.If there are approximately 850 individuals in the cohort,how many individuals can the researchers expect to find alive at the end of the summer,6 months later?

Accepted Answer

A) approximately 1,000 
B) approximately 330 
C) approximately 700 
D) approximately 45 
E) None of the individuals will be alive 6 months later. 
A) approximately 1,000 
B) approximately 330 
C) approximately 700 
D) approximately 45 
E) None of the individuals will be alive 6 months later.

Exam 44: Population Ecology

Most species are intermediate between r-strategists and K-strategists,and tend to have a type II survivorship curve.

All of the following statements about population distribution are true EXCEPT

Which of the following circumstances would cause exponential growth to move into a logistic growth phase?

If the members of a population are small in size,mature early,and have high parity and fecundity,they are

The sequence of decreased death rate followed by a decrease in birthrate is called

In trying to limit the growth of a pest,you will have more success if you can reduce the carrying capacity of the environment rather than reduce the population size of the pest.

The population growth rate is negative when

How is environmental impact measured in a population?

A(n)________ consists of all the populations of multiple species interacting in a designated region.

Density-independent factors which play a role in regulating population size in nature include

In the logistic growth curve formula,when N is very large,(K-N)/N is almost equal to 0,which results in

A population in which death rates are higher than birth rates,and the prereproductive group is smaller than the reproductive group,is best represented by an age structure diagram with a(n)________-shape.

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth.Identify the labeled phases,"A" and "B," and briefly explain what occurs during these phases.

Population size levels off at the ________ of an environment.

Only the LDCs will be experiencing overpopulation growth in the near future.

When discussing population features,a cohort is described as

Since the population of the LDCs is still growing at a significant rate,one would correctly assume that the LDCs consume a much larger proportion of the Earth's resources.

Which of the following lifestyle changes would have the greatest impact on reducing an individual's environmental impact?

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Photosynthesis

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development and Aging

Behavioral Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

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