Question 1

A killing frost is an example of a density- independent factor.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following organisms would have the highest intrinsic rate of increase?

Accepted Answer

A)  bacteria 
B)  blue whales 
C)  red grouse 
D)  elephants 
E)  humans 
A)  bacteria 
B)  blue whales 
C)  red grouse 
D)  elephants 
E)  humans

Question 3

Members of a(n) r-selected species typically have a short lifespan.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following pairs is incorrectly matched?

Accepted Answer

A)  highly developed countries − infant mortality rate close to 7 per 1000 
B)  moderately developed countries − fertility rate near 2 
C)  less developed countries − fertility rate near 5 
D)  worldwide − 27% of the population is less than 15 years old 
E)  United States − doubling time 100 years 
A)  highly developed countries − infant mortality rate close to 7 per 1000 
B)  moderately developed countries − fertility rate near 2 
C)  less developed countries − fertility rate near 5 
D)  worldwide − 27% of the population is less than 15 years old 
E)  United States − doubling time 100 years

Question 5

An example of a density- independent factor is predation.

Accepted Answer

A) True 
 B)False

Question 6

Match between columns
                        Premises: the logistic curve flattens out here
immigration rate
per capita growth rate
natality
the per capita rate at which organisms in a population die each year
"x" in the equation dN/dt = xN
number of individuals in a population
rate at which individuals leave a population
equal to the birth rate minus the death rate
"x" in the equation dN/dt = rN[(x-N)/x]
carrying capacity of the environment
maximum number of individuals an environment can support
per capita birth rate
mortality

Accepted Answer

The Answer of i and N and b and d is...

Question 7

Oysters have a(n) Type-II survivorship curve.

Accepted Answer

A) True 
 B)False

Question 8

Communities are composed of all of the:

Accepted Answer

A)  communities of all the different populations that live together within an area. 
B)  ecosystems within the biosphere. 
C)  populations of all the different species that live together within an area. 
D)  various dispersal patterns of the different species within a given area. 
E)  population's females' combined reproductive capabilities within the same given unit of time. 
A)  communities of all the different populations that live together within an area. 
B)  ecosystems within the biosphere. 
C)  populations of all the different species that live together within an area. 
D)  various dispersal patterns of the different species within a given area. 
E)  population's females' combined reproductive capabilities within the same given unit of time.

Question 9

What term refers to the average rate at which organisms produce offspring?:

Accepted Answer

A)  doubling time 
B)  natality 
C)  emigration 
D)  stasis 
E)  survivorship 
A)  doubling time 
B)  natality 
C)  emigration 
D)  stasis 
E)  survivorship

Question 10

Write out the growth equation including the following factors: natality, mortality, immigration, and emigration. Provide a one-sentence explanation for the impact of each of these factors on the population growth rate.

Accepted Answer

dN/dt = N[(b-d + (i-e] 
b = na

Question 11

When the size of a population greatly exceeds K , we can expect that the population will:

Accepted Answer

A)  rapidly increase. 
B)  slowly increase. 
C)  slowly decrease. 
D)  rapidly decrease. 
E)  stabilize. 
A)  rapidly increase. 
B)  slowly increase. 
C)  slowly decrease. 
D)  rapidly decrease. 
E)  stabilize.

Question 12

Figure 53-4   Based on the accompanying figure, which of the following age intervals has the highest death rate?

Accepted Answer

A)  0 − 1 
B)  1 − 2 
C)  2 − 3 
D)  3 − 4 
E)  4 − 5 
A)  0 − 1 
B)  1 − 2 
C)  2 − 3 
D)  3 − 4 
E)  4 − 5

Question 13

Clumped dispersion is often influenced by:

Accepted Answer

A)  the presence of strange groups. 
B)  sexual reproduction in plants or invertebrates. 
C)  unlimited seed dispersal in plants. 
D)  a patchy distribution of resources. 
E)  homogenous environments. 
A)  the presence of strange groups. 
B)  sexual reproduction in plants or invertebrates. 
C)  unlimited seed dispersal in plants. 
D)  a patchy distribution of resources. 
E)  homogenous environments.

Question 14

The percentages of a population at different ages are known as the:

Accepted Answer

A)  growth rate. 
B)  age structure. 
C)  biotic potential. 
D)  density. 
E)  fecundity. 
A)  growth rate. 
B)  age structure. 
C)  biotic potential. 
D)  density. 
E)  fecundity.

Question 15

Two members of the same species compete for a limited resource, resulting in equal sharing of the limited resource. What is this called?

Accepted Answer

A)  interspecific scramble competition 
B)  intraspecific scramble competition 
C)  interspecific contest competition 
D)  intraspecific contest competition 
E)  density-independent competition 
A)  interspecific scramble competition 
B)  intraspecific scramble competition 
C)  interspecific contest competition 
D)  intraspecific contest competition 
E)  density-independent competition

Question 16

A(n) exponential growth curve has a J shape.

Accepted Answer

A) True 
 B)False

Question 17

Figure 53-4   The accompanying figure is representative of:

Accepted Answer

A)  exponential growth. 
B)  iteroparity. 
C)  Type I survivorship. 
D)  Type III survivorship. 
E)  Type II survivorship. 
A)  exponential growth. 
B)  iteroparity. 
C)  Type I survivorship. 
D)  Type III survivorship. 
E)  Type II survivorship.

Question 18

Figure 53-3   Based on the accompanying figure, the decline in the moose population in 1996 was most likely due to a(n):

Accepted Answer

A)  predictable increase in the wolf population. 
B)  unpredictable increase in the wolf population. 
C)  decrease in the intrinsic rate of increase for the moose population. 
D)  decline in the food supply. 
E)  unknown disease organism. 
A)  predictable increase in the wolf population. 
B)  unpredictable increase in the wolf population. 
C)  decrease in the intrinsic rate of increase for the moose population. 
D)  decline in the food supply. 
E)  unknown disease organism.

Question 19

A(n) exponential growth curve levels off at the carrying capacity.

Accepted Answer

A) True 
 B)False

Question 20

____ are good habitats where local reproductive success is greater than local mortality.

Accepted Answer

A)  Metahabitats 
B)  Sink habitats 
C)  Source populations 
D)  Source habitats 
E)  K -selected habitats 
A)  Metahabitats 
B)  Sink habitats 
C)  Source populations 
D)  Source habitats 
E)  K -selected habitats

Exam 53: Introduction to Ecology Population Ecology

A killing frost is an example of a density- independent factor.

Which of the following organisms would have the highest intrinsic rate of increase?

Members of a(n) r-selected species typically have a short lifespan.

Which of the following pairs is incorrectly matched?

An example of a density- independent factor is predation.

Oysters have a(n) Type-II survivorship curve.

Communities are composed of all of the:

What term refers to the average rate at which organisms produce offspring?:

Write out the growth equation including the following factors: natality, mortality, immigration, and emigration. Provide a one-sentence explanation for the impact of each of these factors on the population growth rate.

When the size of a population greatly exceeds K , we can expect that the population will:

Figure 53-4 Based on the accompanying figure, which of the following age intervals has the highest death rate?

Clumped dispersion is often influenced by:

The percentages of a population at different ages are known as the:

Two members of the same species compete for a limited resource, resulting in equal sharing of the limited resource. What is this called?

A(n) exponential growth curve has a J shape.

Figure 53-4 The accompanying figure is representative of:

Figure 53-3 Based on the accompanying figure, the decline in the moose population in 1996 was most likely due to a(n):

A(n) exponential growth curve levels off at the carrying capacity.

____ are good habitats where local reproductive success is greater than local mortality.

A View of Life

Atoms and Molecules the Chemical Basis of Life

The Chemistry of Life Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp Energy-Releasing Pathways

Photosynthesis Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure Growth and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function an Introduction

Protection Support and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters