Question 1

Elephants are good examples of r-selected species.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following might cause an exponential increase in deer populations across the United States?

Accepted Answer

A) reduction in parasites that are found in emaciated deer 
B) reduction in the population of wolves and bobcats 
C) increase in atmospheric carbon dioxide levels 
D) improvement in forest soil 
A) reduction in parasites that are found in emaciated deer 
B) reduction in the population of wolves and bobcats 
C) increase in atmospheric carbon dioxide levels 
D) improvement in forest soil

Question 3

Per capita use of resources and CO₂ emissions may be just as important as population size when considering stress to the global environment.

Accepted Answer

A) True 
 B)False

Question 4

If a population's death rate is 5 percent and birth rate is 10 percent,its r value would be:

Accepted Answer

A) 15 percent. 
B) 5 percent. 
C) 50 percent. 
D) essentially zero. 
A) 15 percent. 
B) 5 percent. 
C) 50 percent. 
D) essentially zero.

Question 5

Environmental pressures on a population,such as temperature and pH,are density ________ factors.

Accepted Answer

The answer of Environmental pressures on a population,such as temperature...

Question 6

Which of the following is true of logistic growth?

Accepted Answer

A) Logistic growth occurs when predators are very limited in population size. 
B) Logistic growth may start in a way that resembles exponential growth but slows and stabilizes. 
C) Logistic growth describes the growth of a population in an environment with an unlimited carrying capacity. 
D) Logistic growth is plotted as a J-shaped curve. 
A) Logistic growth occurs when predators are very limited in population size. 
B) Logistic growth may start in a way that resembles exponential growth but slows and stabilizes. 
C) Logistic growth describes the growth of a population in an environment with an unlimited carrying capacity. 
D) Logistic growth is plotted as a J-shaped curve.

Question 7

Oak trees grow slowly and put a lot of resources into the trunk,bark,and roots.Seeds are relatively heavy.In the plant kingdom,oaks might be considered:

Accepted Answer

A) density independent. 
B) r-selected. 
C) opportunistic. 
D) K-selected. 
A) density independent. 
B) r-selected. 
C) opportunistic. 
D) K-selected.

Question 8

Why are K-selected species also known as equilibrium species?

Accepted Answer

Their populations te

Question 9

What would be the "r" value or intrinsic rate of growth of a population that had 50 births and 40 deaths per year out of 1000?

Accepted Answer

0.01 or 1

Question 10

Define the term biosphere.

Accepted Answer

The biosphere is the

Question 11

Life tables are used to predict how many individuals will be born in any specific year.

Accepted Answer

A) True 
 B)False

Question 12

A biologist is studying the population dynamics of pocket gophers in a meadow in central Oregon.She noted that,when population numbers are high,death rates from disease and starvation increase.This is an example of:

Accepted Answer

A) r-selected growth. 
B) the principle of intrinsic rate of growth. 
C) exponential growth. 
D) density dependent control. 
A) r-selected growth. 
B) the principle of intrinsic rate of growth. 
C) exponential growth. 
D) density dependent control.

Question 13

Which of the following would be an example of environmental resistance?

Accepted Answer

A) food supply increasing along with a population 
B) bacteria populations producing more toxic waste as they grow 
C) slow gestation periods 
D) life span that increases with population size 
A) food supply increasing along with a population 
B) bacteria populations producing more toxic waste as they grow 
C) slow gestation periods 
D) life span that increases with population size

Question 14

A population of rabbits introduced to an island grows rapidly for a few years,and then growth slows and stabilizes.The population becomes stable because:

Accepted Answer

A) the intrinsic rate of increase has declined. 
B) environmental resistance declined. 
C) immigration was reduced. 
D) the carrying capacity has been reached. 
A) the intrinsic rate of increase has declined. 
B) environmental resistance declined. 
C) immigration was reduced. 
D) the carrying capacity has been reached.

Question 15

Which of the following is true of exponential growth?

Accepted Answer

A) Exponential growth occurs when there are many environmental limits to reproduction. 
B) Exponential growth resembles an S-shaped curve when plotted on a graph. 
C) Exponential growth is growth that continues accelerating with time. 
D) Exponential growth resembles a straight line when plotted on a graph. 
A) Exponential growth occurs when there are many environmental limits to reproduction. 
B) Exponential growth resembles an S-shaped curve when plotted on a graph. 
C) Exponential growth is growth that continues accelerating with time. 
D) Exponential growth resembles a straight line when plotted on a graph.

Question 16

K,in population growth equations,refers to:

Accepted Answer

A) carrying capacity. 
B) the predation factor. 
C) environmental resistance. 
D) biotic potential. 
A) carrying capacity. 
B) the predation factor. 
C) environmental resistance. 
D) biotic potential.

Question 17

Studying the total amount of oxygen generated and released into the atmosphere by living things would be an example of studying ecology at which level?

Accepted Answer

A) community 
B) population 
C) ecosystem 
D) biosphere 
A) community 
B) population 
C) ecosystem 
D) biosphere

Question 18

A negative rate of increase,or a negative r,means that:

Accepted Answer

A) the population is shrinking. 
B) the population has a short generation time. 
C) death rates have decreased. 
D) there is zero population growth. 
A) the population is shrinking. 
B) the population has a short generation time. 
C) death rates have decreased. 
D) there is zero population growth.

Question 19

Compare the trends seen in the characteristics of r-selected and K-selected species,also noting exceptions learned in your study of population ecology.

Accepted Answer

K-selected organisms tend to be larger o

Question 20

Equilibrium species are usually limited by density dependent factors.

Accepted Answer

A) True 
 B)False

Exam 34: An Interactive Living World 1: Populations in Ecology

Elephants are good examples of r-selected species.

Which of the following might cause an exponential increase in deer populations across the United States?

Per capita use of resources and CO₂ emissions may be just as important as population size when considering stress to the global environment.

If a population's death rate is 5 percent and birth rate is 10 percent,its r value would be:

Environmental pressures on a population,such as temperature and pH,are density ________ factors.

Which of the following is true of logistic growth?

Oak trees grow slowly and put a lot of resources into the trunk,bark,and roots.Seeds are relatively heavy.In the plant kingdom,oaks might be considered:

Why are K-selected species also known as equilibrium species?

What would be the "r" value or intrinsic rate of growth of a population that had 50 births and 40 deaths per year out of 1000?

Define the term biosphere.

Life tables are used to predict how many individuals will be born in any specific year.

A biologist is studying the population dynamics of pocket gophers in a meadow in central Oregon.She noted that,when population numbers are high,death rates from disease and starvation increase.This is an example of:

Which of the following would be an example of environmental resistance?

A population of rabbits introduced to an island grows rapidly for a few years,and then growth slows and stabilizes.The population becomes stable because:

Which of the following is true of exponential growth?

K,in population growth equations,refers to:

Studying the total amount of oxygen generated and released into the atmosphere by living things would be an example of studying ecology at which level?

A negative rate of increase,or a negative r,means that:

Compare the trends seen in the characteristics of r-selected and K-selected species,also noting exceptions learned in your study of population ecology.

Equilibrium species are usually limited by density dependent factors.

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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