Question 1

___________ growth occurs when a population increases by a constant proportion from one generation to the next.

Accepted Answer

The answer of ___________ growth occurs when a population increases...

Question 2

A __________ is a group of interacting individuals of the same species living within the same area.

Accepted Answer

The answer of A __________ is a group of interacting...

Question 3

Which of the following statements best describes what will happen to the human population if it continues to increase exponentially?

Accepted Answer

A)  A population crash when natural resources can no longer support the number of people on Earth. 
B)  A gradual conversion to the S-shaped growth curve and eventual stabilization of population size. 
C)  The tightly linked cycle between humans and our predators will become less obvious. 
D)  The irregular fluctuations in human population size will begin to reach greater extremes. 
A)  A population crash when natural resources can no longer support the number of people on Earth. 
B)  A gradual conversion to the S-shaped growth curve and eventual stabilization of population size. 
C)  The tightly linked cycle between humans and our predators will become less obvious. 
D)  The irregular fluctuations in human population size will begin to reach greater extremes.

Question 4

Which of the following has the smallest contribution to annual changes in the size of a population?

Accepted Answer

A)  weather 
B)  predators 
C)  climate 
D)  disease 
A)  weather 
B)  predators 
C)  climate 
D)  disease

Question 5

At room temperature, a population of dangerous bacteria on a piece of raw chicken increases from 100,000 to 400,000 in forty minutes. Its doubling time is __ minutes

Accepted Answer

The answer of At room temperature, a population of dangerous...

Question 6

Which of the following does not provide evidence that resources needed by humans are unsustainable?

Accepted Answer

A)  fish population 
B)  water tables 
C)  logging 
D)  fertilizer use 
A)  fish population 
B)  water tables 
C)  logging 
D)  fertilizer use

Question 7

The graph below shows the growth of a Paramecium population.  
The greatest amount of daily growth occurred when the population was at approximately ___ percent of its carrying capacity

Accepted Answer

A)  10 
B)  25 
C)  50 
D)  100 
A)  10 
B)  25 
C)  50 
D)  100

Question 8

Nene, the Hawaiian goose, live on Maui. Their population density is .164 per square kilometer. Maui is 1,830 square kilometers in size. Approximately how many nene live on Maui?

Accepted Answer

A)  16 
B)  150 
C)  300 
D)  11,600 
A)  16 
B)  150 
C)  300 
D)  11,600

Question 9

Pollution
is one of the many density-dependent factors that limit population growth.

Accepted Answer

A) True 
 B)False

Question 10

If there are 100 people living in a 2-square-kilometer area, the population density is _______.

Accepted Answer

50 people

Question 11

Density-dependent factors are more likely to limit population growth when

Accepted Answer

A)  there are more individuals living in the same amount of space. 
B)  the population moves into a larger habitat. 
C)  food is abundant. 
D)  weather conditions become milder. 
A)  there are more individuals living in the same amount of space. 
B)  the population moves into a larger habitat. 
C)  food is abundant. 
D)  weather conditions become milder.

Question 12

Which of the following choices best explains why some introduced species experience an initial period of exponential growth?

Accepted Answer

A)  They do not yet have any natural predators in their new habitat. 
B)  Most introduced species show better survival in new habitats than in their old ones. 
C)  Since most native species display exponential growth, many introduced species will do so also. 
D)  Native species always leave open habitat types that a new species can inhabit. 
A)  They do not yet have any natural predators in their new habitat. 
B)  Most introduced species show better survival in new habitats than in their old ones. 
C)  Since most native species display exponential growth, many introduced species will do so also. 
D)  Native species always leave open habitat types that a new species can inhabit.

Question 13

The carrying capacity of owls in an Alaskan forest is 8 per square kilometer. What will happen if 12 owls are confined to a 1-square-kilometer area?

Accepted Answer

A)  The owls will survive together and develop ways to share resources. 
B)  The owls might survive as malnourished adults but the next generation will have no more than 8 individuals. 
C)  The population of owl prey organisms will increase proportionately. 
D)  A short-term exponential growth of owls will occur. 
A)  The owls will survive together and develop ways to share resources. 
B)  The owls might survive as malnourished adults but the next generation will have no more than 8 individuals. 
C)  The population of owl prey organisms will increase proportionately. 
D)  A short-term exponential growth of owls will occur.

Question 14

The term population density describes the

Accepted Answer

A)  body size of different species. 
B)  number of individuals per unit area. 
C)  number of populations per unit area. 
D)  number of species per unit area. 
A)  body size of different species. 
B)  number of individuals per unit area. 
C)  number of populations per unit area. 
D)  number of species per unit area.

Question 15

A vector is a term used to describe an organism that moves a disease organism from one host to another. What is the vector associated with the encephalitis caused by West Nile virus?

Accepted Answer

A)  field mice 
B)  mosquitoes 
C)  feral cats 
D)  wild birds 
A)  field mice 
B)  mosquitoes 
C)  feral cats 
D)  wild birds

Question 16

Natural disasters can limit population growth in ways not related to population density.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following populations would be most likely to experience an S-shaped growth pattern?

Accepted Answer

A)  all of the animals in the San Diego Zoo 
B)  Gause's paramecia without a constant food supply 
C)  a founding colony of rats on a small island with abundant resources 
D)  a beehive infected mid-summer with a deadly bacterial disease 
A)  all of the animals in the San Diego Zoo 
B)  Gause's paramecia without a constant food supply 
C)  a founding colony of rats on a small island with abundant resources 
D)  a beehive infected mid-summer with a deadly bacterial disease

Question 18

The figure below shows that the human population was small and relatively stable for nearly 12,000 years, but has increased dramatically in the past 200 years.  
How might this increase in population growth be explained?

Accepted Answer

A)  Disease prevented any significant growth of the human population. 
B)  For most of human history people were too malnourished to have children. 
C)  People simply chose to have fewer children in the past than at present. 
D)  Prior human populations were at existing carrying capacities but newly developed technologies have raised the carrying capacity and permitted the recent expansion. 
A)  Disease prevented any significant growth of the human population. 
B)  For most of human history people were too malnourished to have children. 
C)  People simply chose to have fewer children in the past than at present. 
D)  Prior human populations were at existing carrying capacities but newly developed technologies have raised the carrying capacity and permitted the recent expansion.

Question 19

The effects of pollution are generally considered to be density-independent because

Accepted Answer

A)  the contamination level of any organism is unaffected by variations in population density. 
B)  when food supplies become limited, the organisms are more likely to consume contaminated foods. 
C)  at high densities the organisms are more likely to contact the pollutant. 
D)  when the organisms are stressed by overcrowding, the pollutant becomes more toxic. 
A)  the contamination level of any organism is unaffected by variations in population density. 
B)  when food supplies become limited, the organisms are more likely to consume contaminated foods. 
C)  at high densities the organisms are more likely to contact the pollutant. 
D)  when the organisms are stressed by overcrowding, the pollutant becomes more toxic.

Question 20

Examine the graph below.  
What statement best describes the relationship between planting density and seed production per individual plant?

Accepted Answer

A)  At high planting densities, both seed production per plant and total seeds produced declines. 
B)  At high planting densities, seed production per plant declines while total seeds produced remains constant. 
C)  At low planting densities, both seed production per plant and total seeds produced increases. 
D)  At high planting densities, seed production per plant declines while total seeds produced increases. 
A)  At high planting densities, both seed production per plant and total seeds produced declines. 
B)  At high planting densities, seed production per plant declines while total seeds produced remains constant. 
C)  At low planting densities, both seed production per plant and total seeds produced increases. 
D)  At high planting densities, seed production per plant declines while total seeds produced increases.

Exam 34: Growth of Populations

___________ growth occurs when a population increases by a constant proportion from one generation to the next.

A __________ is a group of interacting individuals of the same species living within the same area.

Which of the following statements best describes what will happen to the human population if it continues to increase exponentially?

Which of the following has the smallest contribution to annual changes in the size of a population?

At room temperature, a population of dangerous bacteria on a piece of raw chicken increases from 100,000 to 400,000 in forty minutes. Its doubling time is __ minutes

Which of the following does not provide evidence that resources needed by humans are unsustainable?

The graph below shows the growth of a Paramecium population. The greatest amount of daily growth occurred when the population was at approximately ___ percent of its carrying capacity

Nene, the Hawaiian goose, live on Maui. Their population density is .164 per square kilometer. Maui is 1,830 square kilometers in size. Approximately how many nene live on Maui?

Pollution is one of the many density-dependent factors that limit population growth.

If there are 100 people living in a 2-square-kilometer area, the population density is _______.

Density-dependent factors are more likely to limit population growth when

Which of the following choices best explains why some introduced species experience an initial period of exponential growth?

The carrying capacity of owls in an Alaskan forest is 8 per square kilometer. What will happen if 12 owls are confined to a 1-square-kilometer area?

The term population density describes the

A vector is a term used to describe an organism that moves a disease organism from one host to another. What is the vector associated with the encephalitis caused by West Nile virus?

Natural disasters can limit population growth in ways not related to population density.

Which of the following populations would be most likely to experience an S-shaped growth pattern?

The figure below shows that the human population was small and relatively stable for nearly 12,000 years, but has increased dramatically in the past 200 years. How might this increase in population growth be explained?

The effects of pollution are generally considered to be density-independent because

Examine the graph below. What statement best describes the relationship between planting density and seed production per individual plant?

The Nature of Science and the Characteristics of Life

Organizing the Diversity of Life

Major Groups of Living Organisms

Chemical Building Blocks

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

DNA

From Gene to Protein

Control of Gene Expression

DNA Technology

How Evolution Works

Evolution of Populations

Adaptation and Speciation

The Evolutionary History of Life

Maintaining the Internal Environment

Animal Nutrition and Digestion

Gas Exchange

The Circulatory System

Animal Hormones

The Nervous System

Sensing the Environment

Skeletons, Muscles, and Movement

Defenses against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

The Biosphere

Interactions among Organisms

Communities of Organisms

Ecosystems

Global Change

Biodiversity and People

Cancer: Cell Division Out of Control

Harnessing the Human Genome

Humans and Evolution

Smoking--Beyond Lung Cancer

Feeding a Hungry Planet

Building a Sustainable Society

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