Question 1

What seems to be the most influential factor in making possible the explosion in the human population that began around 1800?

Accepted Answer

A)  more food production 
B)  the industrial revolution 
C)  conquering of diseases 
D)  genetic mutations 
A)  more food production 
B)  the industrial revolution 
C)  conquering of diseases 
D)  genetic mutations

Question 2

The population of the United States continues to grow as a result of:

Accepted Answer

A)  immigration. 
B)  increases in r. 
C)  an inverted triangular pyramid. 
D)  Both A and C are correct. 
A)  immigration. 
B)  increases in r. 
C)  an inverted triangular pyramid. 
D)  Both A and C are correct.

Question 3

Dandelions have a short life span and a high investment in seed production, but each seed is small and wind-dispersed. This is an example of:

Accepted Answer

A)  a K-selected species. 
B)  an equilibrium species. 
C)  an r-selected species. 
D)  a density-dependent species. 
A)  a K-selected species. 
B)  an equilibrium species. 
C)  an r-selected species. 
D)  a density-dependent species.

Question 4

Ecologists often say that one individual living in a developed country cannot be counted as ecologically equal to one individual from a developing country. Why?

Accepted Answer

Fertility rates differ conside

Question 5

It is possible to have a community that consists of a single species.

Accepted Answer

A) True 
 B)False

Question 6

What can be said about K-selected species relative to the carrying capacity of their habitat?

Accepted Answer

A)  They never approach the carrying capacity. 
B)  They never exceed the carrying capacity. 
C)  They always exceed the carrying capacity. 
D)  They sometimes exceed the carrying capacity. 
A)  They never approach the carrying capacity. 
B)  They never exceed the carrying capacity. 
C)  They always exceed the carrying capacity. 
D)  They sometimes exceed the carrying capacity.

Question 7

Exponential growth:

Accepted Answer

A)  occurs when there are many environmental limits to reproduction. 
B)  is an S-shaped curve when plotted. 
C)  occurs when the population increases in proportion to the number of organisms in the population. 
D)  is never characteristic of an invading species. 
A)  occurs when there are many environmental limits to reproduction. 
B)  is an S-shaped curve when plotted. 
C)  occurs when the population increases in proportion to the number of organisms in the population. 
D)  is never characteristic of an invading species.

Question 8

For each of the scientific studies described in the questions that follow, choose the scale of the study.
-Egg production in Rana catesbeiana grown at different ambient temperatures

Accepted Answer

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

Question 9

Refer to the figure above and then answer the question that follows.
-In many developing countries, the population pyramid is broad at the base and narrow at the top. What does this indicate?

Accepted Answer

A)  That growth is arithmetic. 
B)  That there are few, if any, density-dependent factors affecting population size. 
C)  That fertility is increasing. 
D)  That there are more young individuals than post-reproductive individuals. 
A)  That growth is arithmetic. 
B)  That there are few, if any, density-dependent factors affecting population size. 
C)  That fertility is increasing. 
D)  That there are more young individuals than post-reproductive individuals.

Question 10

If a population of mountain lions adds new individuals equal to 5 percent of the population each year, we would classify this type of growth as:

Accepted Answer

A)  increasing. 
B)  exponential. 
C)  arithmetic. 
D)  positive. 
A)  increasing. 
B)  exponential. 
C)  arithmetic. 
D)  positive.

Question 11

What kind of growth would you expect from a species of clam that invades a large lake in which no clams live?

Accepted Answer

A)  steady 
B)  exponential 
C)  arithmetic 
D)  positive 
A)  steady 
B)  exponential 
C)  arithmetic 
D)  positive

Question 12

Which is true?

Accepted Answer

A)  The U.S. population will exceed 1.5 billion by the middle of the next century. 
B)  Immigration is not expected to have a large effect on the U.S. population in the next century. 
C)  The birth rate of the U.S. population is expected to be lower than the death rate by the middle of the next century. 
D)  Emigration is expected to have a large effect on the U.S. population in the next century. 
A)  The U.S. population will exceed 1.5 billion by the middle of the next century. 
B)  Immigration is not expected to have a large effect on the U.S. population in the next century. 
C)  The birth rate of the U.S. population is expected to be lower than the death rate by the middle of the next century. 
D)  Emigration is expected to have a large effect on the U.S. population in the next century.

Question 13

For each of the scientific studies described in the questions that follow, choose the scale of the study.
-All of the individuals of Rana catesbeiana in a pond in central Massachusetts comprise a:

Accepted Answer

A)  population. 
B)  guild. 
C)  biome. 
D)  caste. 
A)  population. 
B)  guild. 
C)  biome. 
D)  caste.

Question 14

Most organisms in the real world follow an arithmetic growth pattern, rather than an exponential growth pattern.

Accepted Answer

A) True 
 B)False

Question 15

In more-developed countries, the population pyramid tends to be shaped like:

Accepted Answer

A)  an inverted triangle. 
B)  an egg. 
C)  a pyramid. 
D)  a rectangle. 
A)  an inverted triangle. 
B)  an egg. 
C)  a pyramid. 
D)  a rectangle.

Question 16

Though thought of as an equilibrium species, humans currently exhibit growth patterns more common to:

Accepted Answer

A)  G-selected species. 
B)  E-selected species. 
C)  K-selected species. 
D)  r-selected species. 
A)  G-selected species. 
B)  E-selected species. 
C)  K-selected species. 
D)  r-selected species.

Question 17

Environmental resistance can turn a J-shaped growth curve into an S-shaped growth curve.

Accepted Answer

A) True 
 B)False

Question 18

Human populations have shown a rapid growth increase in the last century by increasing their:

Accepted Answer

A)  biotic potential. 
B)  intrinsic rate of increase. 
C)  carrying capacity. 
D)  fertility rates. 
A)  biotic potential. 
B)  intrinsic rate of increase. 
C)  carrying capacity. 
D)  fertility rates.

Question 19

Which statement is true about a population that is relatively undisturbed by humans?

Accepted Answer

A)  It grows logistically with a carrying capacity that can change. 
B)  It grows exponentially with a carrying capacity that can change. 
C)  It grows logistically with a carrying capacity that is constant. 
D)  It grows arithmetically with a population limit. 
A)  It grows logistically with a carrying capacity that can change. 
B)  It grows exponentially with a carrying capacity that can change. 
C)  It grows logistically with a carrying capacity that is constant. 
D)  It grows arithmetically with a population limit.

Question 20

Which of the following is/are true?

Accepted Answer

A)  Birth rates of cohorts are plotted by age on a population pyramid. 
B)  A population pyramid can show relative numbers of young versus post-reproductive individuals. 
C)  K can be determined from a population pyramid by subtracting the number in the top row from the number in the bottom row. 
D)  Both A and C are correct. 
A)  Birth rates of cohorts are plotted by age on a population pyramid. 
B)  A population pyramid can show relative numbers of young versus post-reproductive individuals. 
C)  K can be determined from a population pyramid by subtracting the number in the top row from the number in the bottom row. 
D)  Both A and C are correct.

Exam 33: Populations in Ecology

What seems to be the most influential factor in making possible the explosion in the human population that began around 1800?

The population of the United States continues to grow as a result of:

Dandelions have a short life span and a high investment in seed production, but each seed is small and wind-dispersed. This is an example of:

Ecologists often say that one individual living in a developed country cannot be counted as ecologically equal to one individual from a developing country. Why?

It is possible to have a community that consists of a single species.

What can be said about K-selected species relative to the carrying capacity of their habitat?

Exponential growth:

For each of the scientific studies described in the questions that follow, choose the scale of the study. -Egg production in Rana catesbeiana grown at different ambient temperatures

Refer to the figure above and then answer the question that follows. -In many developing countries, the population pyramid is broad at the base and narrow at the top. What does this indicate?

If a population of mountain lions adds new individuals equal to 5 percent of the population each year, we would classify this type of growth as:

What kind of growth would you expect from a species of clam that invades a large lake in which no clams live?

Which is true?

For each of the scientific studies described in the questions that follow, choose the scale of the study. -All of the individuals of Rana catesbeiana in a pond in central Massachusetts comprise a:

Most organisms in the real world follow an arithmetic growth pattern, rather than an exponential growth pattern.

In more-developed countries, the population pyramid tends to be shaped like:

Though thought of as an equilibrium species, humans currently exhibit growth patterns more common to:

Environmental resistance can turn a J-shaped growth curve into an S-shaped growth curve.

Human populations have shown a rapid growth increase in the last century by increasing their:

Which statement is true about a population that is relatively undisturbed by humans?

Which of the following is/are true?

A Guide to the Natural World

Chemistry, Water and PH

Lifes Components: Biological Molecules

Lifes Home: The Cell

Lifes Border: The Plasma Membrane

An Introduction to Energy

Deriving Energy From Food

Photosynthesis

Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

Mendel and His Discoveries

Chromosomes and Inheritance

Dna Structure and Replication

Transcription Translation and Regulation

Biotechnology

Charles Darwin, Evolutionary Thought, and the Evidence for Evolution

Microevolution

Macroevolution

The History of Life on Earth

The Evolution of Human Beings

The Diversity of Life 1

The Diversity of Life 2

The Diversity of Life 3

An Introduction to Flowering Plants

Form and Function in Flowering Plants

The Integumentary Skeletal and Muscular Systems

The Nervous and Endocrine System

The Immune System

Blood and Breath

Digestion, Nutrition and Elimination

Animal Development

Human Reproduction

Communities in Ecology

Ecosystems and Biomes

Animal Behavior

Filters