Question 1

Which of the following statements about populations that follow logistic growth patterns is true?

Accepted Answer

A)  When population sizes are small, their patterns of growth are similar to their exponential growth. 
B)  Their rate of growth is fastest when they are near their carrying capacity. 
C)  They are not subject to density-dependent factors. 
D)  All of the above 
E)  None of the above 
A)  When population sizes are small, their patterns of growth are similar to their exponential growth. 
B)  Their rate of growth is fastest when they are near their carrying capacity. 
C)  They are not subject to density-dependent factors. 
D)  All of the above 
E)  None of the above

Question 2

The population density is the number of individuals in the population _______ by the area of the space covered by the population.

Accepted Answer

The answer of The population density is the number of...

Question 3

Eighty-one pocket gophers were present in Maddox Field at the start of 2006. During that year, 24 individuals were born, and 19 died. Twelve individuals immigrated, and 10 emigrated. How many pocket gophers were present in Maddox Field at the start of 2007?

Accepted Answer

A)  76 
B)  81 
C)  86 
D)  88 
E)  146 
A)  76 
B)  81 
C)  86 
D)  88 
E)  146

Question 4

Use the following to answer questions :
Refer to the graph below.  
-In the logistic population growth curve shown in the graph, the rate of growth is greatest at which point?

Accepted Answer

The answer of Use the following to answer questions :
Refer...

Question 5

If a certain age interval in a population contains ten individuals and has a mortality rate of 1.00, how many individuals will be in the next older age interval?

Accepted Answer

A)  0 
B)  1 
C)  5 
D)  9 
E)  10 
A)  0 
B)  1 
C)  5 
D)  9 
E)  10

Question 6

The best way to reduce the population of an undesirable species in the long term is to

Accepted Answer

A)  reduce the carrying capacity of the environment for the species. 
B)  selectively kill reproducing adults. 
C)  selectively kill prereproductive individuals. 
D)  attempt to kill individuals of all ages. 
E)  sterilize individuals. 
A)  reduce the carrying capacity of the environment for the species. 
B)  selectively kill reproducing adults. 
C)  selectively kill prereproductive individuals. 
D)  attempt to kill individuals of all ages. 
E)  sterilize individuals.

Question 7

Species such as humans, which can reproduce many times throughout their lives, are called _______.

Accepted Answer

The answer of Species such as humans, which can reproduce...

Question 8

Biologists construct _______ tables to display information about births and deaths in a population over long periods of time.

Accepted Answer

The answer of Biologists construct _______ tables to display information...

Question 9

Births, deaths, and patterns of migration are all considered _______ events.

Accepted Answer

The answer of Births, deaths, and patterns of migration are...

Question 10

In the Grants' 1978 study, the most important environmental factor affecting survival in cactus finches on Isla Daphne was discovered to be

Accepted Answer

A)  rainfall. 
B)  temperature. 
C)  biotic factors. 
D)  predation. 
E)  None of the above 
A)  rainfall. 
B)  temperature. 
C)  biotic factors. 
D)  predation. 
E)  None of the above

Question 11

If birth rates exceed death rates and both rates are relatively constant, a population will experience _______ growth.

Accepted Answer

The answer of If birth rates exceed death rates and...

Question 12

Which of the following is not typical of a K-strategy species?

Accepted Answer

A)  Parental care 
B)  A long life span 
C)  Specialized use of resources 
D)  A small number of offspring 
E)  All of the above are typical of a K-strategy species. 
A)  Parental care 
B)  A long life span 
C)  Specialized use of resources 
D)  A small number of offspring 
E)  All of the above are typical of a K-strategy species.

Question 13

How does the division of some populations into discrete subpopulations relate to the process known as the rescue effect? How do barriers to immigration influence the rescue effect?

Accepted Answer

The rescue effect occurs if a subpopulat

Question 14

A metapopulation is

Accepted Answer

A)  an unusually large population. 
B)  a population that is spread out over a very large area. 
C)  a group of subpopulations among which some individuals move occasionally. 
D)  a group of subpopulations that are isolated from one another. 
E)  a group of subpopulations among which individuals move on a regular basis. 
A)  an unusually large population. 
B)  a population that is spread out over a very large area. 
C)  a group of subpopulations among which some individuals move occasionally. 
D)  a group of subpopulations that are isolated from one another. 
E)  a group of subpopulations among which individuals move on a regular basis.

Question 15

Which of the following is an example of density-independent population regulation?

Accepted Answer

A)  A contagious disease sweeps through a dense population of squirrels but leaves a less dense population relatively untouched. 
B)  Predators of lemmings search widely for places where lemmings are abundant and concentrate their hunting in those areas. 
C)  An outbreak of a moth species leads to a depletion of the food supply. As a result, the next generation of moths is underfed and produces few offspring. 
D)  When lemmings are abundant, arctic foxes switch from a primary diet of mice to a primary diet of lemmings. 
E)  An early cold spell kills 80 percent of the sparrows in a particular area. 
A)  A contagious disease sweeps through a dense population of squirrels but leaves a less dense population relatively untouched. 
B)  Predators of lemmings search widely for places where lemmings are abundant and concentrate their hunting in those areas. 
C)  An outbreak of a moth species leads to a depletion of the food supply. As a result, the next generation of moths is underfed and produces few offspring. 
D)  When lemmings are abundant, arctic foxes switch from a primary diet of mice to a primary diet of lemmings. 
E)  An early cold spell kills 80 percent of the sparrows in a particular area.

Question 16

For which of the following populations would biologists most likely use number per unit of volume, rather than number per unit of area, in measuring population density?

Accepted Answer

A)  Pine trees in a forest 
B)  Mice in a patch of grassland 
C)  Guppies in a lake 
D)  Squirrels on a campus 
E)  Oak seedlings in a backyard 
A)  Pine trees in a forest 
B)  Mice in a patch of grassland 
C)  Guppies in a lake 
D)  Squirrels on a campus 
E)  Oak seedlings in a backyard

Question 17

We would expect populations to grow close to or at their intrinsic rate of growth when

Accepted Answer

A)  they are near their environmental carrying capacity. 
B)  their numbers are low. 
C)  they have depleted their food supply. 
D)  density-dependent factors are reducing birth rates. 
E)  Both a and c 
A)  they are near their environmental carrying capacity. 
B)  their numbers are low. 
C)  they have depleted their food supply. 
D)  density-dependent factors are reducing birth rates. 
E)  Both a and c

Question 18

A greater likelihood of parasite infestation as population numbers increase is an example of a density-_______ factor in population growth.

Accepted Answer

The answer of A greater likelihood of parasite infestation as...

Question 19

Suppose that in a species of beetle, close proximity to another individual of the same species enhances survival. This phenomenon would likely lead to a _______ dispersion pattern for the species.

Accepted Answer

The answer of Suppose that in a species of beetle,...

Question 20

Some species of fish in the salmon family (called salmonids) are anadromous, meaning that they mature in salt water but migrate to bodies of fresh water to breed. These species are usually semelparous. Other nonanadromous species in this family live their entire lives in bodies of fresh water and are generally iteroparous. What might be the explanation for the difference in the life history patterns of these two groups of salmonids?

Accepted Answer

Semelparity is typical of organisms that

Exam 55: Population Ecology

Which of the following statements about populations that follow logistic growth patterns is true?

The population density is the number of individuals in the population _______ by the area of the space covered by the population.

Eighty-one pocket gophers were present in Maddox Field at the start of 2006. During that year, 24 individuals were born, and 19 died. Twelve individuals immigrated, and 10 emigrated. How many pocket gophers were present in Maddox Field at the start of 2007?

Use the following to answer questions : Refer to the graph below. -In the logistic population growth curve shown in the graph, the rate of growth is greatest at which point?

If a certain age interval in a population contains ten individuals and has a mortality rate of 1.00, how many individuals will be in the next older age interval?

The best way to reduce the population of an undesirable species in the long term is to

Species such as humans, which can reproduce many times throughout their lives, are called _______.

Biologists construct _______ tables to display information about births and deaths in a population over long periods of time.

Births, deaths, and patterns of migration are all considered _______ events.

In the Grants' 1978 study, the most important environmental factor affecting survival in cactus finches on Isla Daphne was discovered to be

If birth rates exceed death rates and both rates are relatively constant, a population will experience _______ growth.

Which of the following is not typical of a K-strategy species?

How does the division of some populations into discrete subpopulations relate to the process known as the rescue effect? How do barriers to immigration influence the rescue effect?

A metapopulation is

Which of the following is an example of density-independent population regulation?

For which of the following populations would biologists most likely use number per unit of volume, rather than number per unit of area, in measuring population density?

We would expect populations to grow close to or at their intrinsic rate of growth when

A greater likelihood of parasite infestation as population numbers increase is an example of a density-_______ factor in population growth.

Suppose that in a species of beetle, close proximity to another individual of the same species enhances survival. This phenomenon would likely lead to a _______ dispersion pattern for the species.

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Signaling and Communication

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

Development and Evolutionary Change

Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Function

Musculoskeletal Systems

Gas Exchange in Animals

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen

Animal Behavior

Ecology and the Distribution of Life

Species Interaction and Coevolution

Community Ecology

Ecosystems and Global Ecology

Conservation Biology

Filters