Question 1

Due to the difficulty of following their populations over a complete life cycle, which population would more likely be studied by using a static, rather than a cohort, life table?

Accepted Answer

A)  Barnacles on a pier 
B)  Sperm whales in the ocean 
C)  Coral larvae settling on a reef 
D)  Humans tracked by an insurance company 
E)  Garden spiders that spend their lives in a garden 
A)  Barnacles on a pier 
B)  Sperm whales in the ocean 
C)  Coral larvae settling on a reef 
D)  Humans tracked by an insurance company 
E)  Garden spiders that spend their lives in a garden

Question 2

Both schools of sardines and flocks of starlings move together as a group, which confuses predators.This behavior is more effective with more individuals in the group.This illustrates the _______ effect.

Accepted Answer

The answer of Both schools of sardines and flocks of...

Question 3

Density-dependent regulatory factors include all of these except

Accepted Answer

A)  predators. 
B)  disease. 
C)  food supply. 
D)  poor nutrition. 
E)  extreme temperature. 
A)  predators. 
B)  disease. 
C)  food supply. 
D)  poor nutrition. 
E)  extreme temperature.

Question 4

As an alternative to chemical pesticides, ecologists often recommend biological control: the introduction of predators or parasites of pests to control an undesirable population.Give one benefit and one risk of this strategy.

Accepted Answer

The biggest benefit is that the natural

Question 5

Sustainable management of whale populations is generally considered more difficult than that of fish populations because whales

Accepted Answer

A)  are r-strategists. 
B)  have undergone a population explosion. 
C)  reproduce at much lower rates than fish do. 
D)  are not capable of rebuilding their populations. 
E)  are distributed widely throughout the world's oceans. 
A)  are r-strategists. 
B)  have undergone a population explosion. 
C)  reproduce at much lower rates than fish do. 
D)  are not capable of rebuilding their populations. 
E)  are distributed widely throughout the world's oceans.

Question 6

All of the populations described below would be expected to be growing at or near their maximum rate except

Accepted Answer

A)  rats introduced to a mammal-free Pacific island where thousands of breeding birds provide food. 
B)  Burmese pythons introduced to the Florida Everglades, where they have no predators. 
C)  deer in areas where wolves, their main predator, have been made locally extinct. 
D)  grizzly bears in an area of Alaska where they have lived historically and food availability is stable. 
E)  poisonous brown tree snakes introduced to the island of Guam, where they have no predators or competitors. 
A)  rats introduced to a mammal-free Pacific island where thousands of breeding birds provide food. 
B)  Burmese pythons introduced to the Florida Everglades, where they have no predators. 
C)  deer in areas where wolves, their main predator, have been made locally extinct. 
D)  grizzly bears in an area of Alaska where they have lived historically and food availability is stable. 
E)  poisonous brown tree snakes introduced to the island of Guam, where they have no predators or competitors.

Question 7

Which factor of population dynamics could not be determined from a cohort life table?

Accepted Answer

A)  Fecundity 
B)  Survivorship 
C)  Generation time 
D)  Carrying capacity 
E)  Net reproductive rate 
A)  Fecundity 
B)  Survivorship 
C)  Generation time 
D)  Carrying capacity 
E)  Net reproductive rate

Question 8

Based on our current knowledge, it appears that the human life span

Accepted Answer

A)  is currently leveling off. 
B)  will continue to increase. 
C)  will soon reach a genetically controlled limit. 
D)  is very inflexible and must reach a limit soon. 
E)  is controlled equally by genetic and environmental factors. 
A)  is currently leveling off. 
B)  will continue to increase. 
C)  will soon reach a genetically controlled limit. 
D)  is very inflexible and must reach a limit soon. 
E)  is controlled equally by genetic and environmental factors.

Question 9

In the logistic population growth curve shown here, the rate of growth is greatest at which point?

Accepted Answer

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

Question 10

Humans in most countries now have a life expectancy of 75 years or more, compared to 30-40 years in the 1800s.German researchers recently found that the average onset of puberty in 1860 was 16.6 years; by 2010, it had dropped to 10.5.These statistics provide evidence that life history changes with

Accepted Answer

A)  time. 
B)  genetics. 
C)  ethnicity. 
D)  life history. 
E)  reproductive rate. 
A)  time. 
B)  genetics. 
C)  ethnicity. 
D)  life history. 
E)  reproductive rate.

Question 11

A population has 150 female and 100 male baboons.During a time period, 45 babies are born.The fecundity of the population for that time period is _______.

Accepted Answer

The answer of A population has 150 female and 100...

Question 12

The J-shaped exponential population growth curve occurs because the population changes by

Accepted Answer

A)  a constant amount over time. 
B)  a constant proportion over time. 
C)  an increasing amount over time. 
D)  an increasing proportion over time. 
E)  zero at the beginning, followed by a constant proportion. 
A)  a constant amount over time. 
B)  a constant proportion over time. 
C)  an increasing amount over time. 
D)  an increasing proportion over time. 
E)  zero at the beginning, followed by a constant proportion.

Question 13

In an open population, the population growth rate can be estimated using the equation ∆N = B - D only if

Accepted Answer

A)  the population is stable. 
B)  the population is growing. 
C)  the population is declining. 
D)  immigration equals emigration. 
E)  neither immigration nor emigration is occurring. 
A)  the population is stable. 
B)  the population is growing. 
C)  the population is declining. 
D)  immigration equals emigration. 
E)  neither immigration nor emigration is occurring.

Question 14

The quadrat method of estimating population size would likely be most appropriate for a population of

Accepted Answer

A)  frogs in a lake. 
B)  mice in a field. 
C)  warblers in a forest. 
D)  plankton in a pond. 
E)  dandelions in a lawn. 
A)  frogs in a lake. 
B)  mice in a field. 
C)  warblers in a forest. 
D)  plankton in a pond. 
E)  dandelions in a lawn.

Question 15

Without strict management controls, which of these populations is most likely to be overharvested?

Accepted Answer

A)  A fish population that grows rapidly and is not a preferred food species 
B)  A wild plant, introduced into a new location, that crowds out native plants 
C)  A large herring population that produces many millions of offspring every year 
D)  A rapidly reproducing deer population that is spread over a wide geographical area 
E)  A whale population with a very slow reproductive rate that produces few offspring 
A)  A fish population that grows rapidly and is not a preferred food species 
B)  A wild plant, introduced into a new location, that crowds out native plants 
C)  A large herring population that produces many millions of offspring every year 
D)  A rapidly reproducing deer population that is spread over a wide geographical area 
E)  A whale population with a very slow reproductive rate that produces few offspring

Question 16

Recent studies show that many types of animals besides humans have personalities.Behavioral differences (for example, variations in boldness or aggressiveness) persist across a population over time; that is, different levels of boldness and wariness coexist.Even though a trait for boldness might be dangerous for individuals who possess it, it might be adaptive in a population because, under certain circumstances, the bolder individuals are likely to

Accepted Answer

A)  have longer life spans. 
B)  produce more offspring. 
C)  be less affected by predators. 
D)  chase off other bold individuals. 
E)  lead the population to occupy new territory. 
A)  have longer life spans. 
B)  produce more offspring. 
C)  be less affected by predators. 
D)  chase off other bold individuals. 
E)  lead the population to occupy new territory.

Question 17

Climate change is altering many aspects of current populations, including the ability to live in their usual habitats; the availability of food, water, and other resources; and even rates of reproduction.The primary type of limitation in this case is

Accepted Answer

A)  density-dependent, because resources are limited. 
B)  density-dependent, because reproduction is affected. 
C)  density-dependent, because climate effects are dependent on population size. 
D)  density-independent, because climate effects are independent of population size. 
E)  density-independent, because climate affects some populations more than others. 
A)  density-dependent, because resources are limited. 
B)  density-dependent, because reproduction is affected. 
C)  density-dependent, because climate effects are dependent on population size. 
D)  density-independent, because climate effects are independent of population size. 
E)  density-independent, because climate affects some populations more than others.

Question 18

The mark-recapture method would be best suited for estimating the population size of

Accepted Answer

A)  fish in a lake. 
B)  corals in a reef. 
C)  elephants in a sanctuary. 
D)  lichens in the Arctic. 
E)  plants on a prairie. 
A)  fish in a lake. 
B)  corals in a reef. 
C)  elephants in a sanctuary. 
D)  lichens in the Arctic. 
E)  plants on a prairie.

Question 19

The poisonous cane toad was introduced to Australia to control cane beetles.It had no effect on the beetles, but in the absence of predators, it has been consuming many other native species.This is an example of

Accepted Answer

A)  successful introduction of an exotic species. 
B)  controlling a species by removing its resources. 
C)  a source population becoming a sink population. 
D)  successful use of biological control of a non-native species. 
E)  an intended biological control organism becoming a pest, itself. 
A)  successful introduction of an exotic species. 
B)  controlling a species by removing its resources. 
C)  a source population becoming a sink population. 
D)  successful use of biological control of a non-native species. 
E)  an intended biological control organism becoming a pest, itself.

Question 20

What difference, if any, is there in the management of r-strategist and K-strategist populations?

Accepted Answer

A)  No difference; r-strategist and K-strategist populations can be managed in the same way. 
B)  K-strategists reproduce more slowly but recover more quickly than r-strategists after overharvesting. 
C)  K-strategists reproduce more quickly but recover more slowly than r-strategists after overharvesting. 
D)  K-strategists reproduce more slowly and recover more slowly than r-strategists after overharvesting. 
E)  K-strategists reproduce more quickly and recover more quickly than r-strategists after overharvesting. 
A)  No difference; r-strategist and K-strategist populations can be managed in the same way. 
B)  K-strategists reproduce more slowly but recover more quickly than r-strategists after overharvesting. 
C)  K-strategists reproduce more quickly but recover more slowly than r-strategists after overharvesting. 
D)  K-strategists reproduce more slowly and recover more slowly than r-strategists after overharvesting. 
E)  K-strategists reproduce more quickly and recover more quickly than r-strategists after overharvesting.

Exam 54: Populations

Due to the difficulty of following their populations over a complete life cycle, which population would more likely be studied by using a static, rather than a cohort, life table?

Both schools of sardines and flocks of starlings move together as a group, which confuses predators.This behavior is more effective with more individuals in the group.This illustrates the _______ effect.

Density-dependent regulatory factors include all of these except

As an alternative to chemical pesticides, ecologists often recommend biological control: the introduction of predators or parasites of pests to control an undesirable population.Give one benefit and one risk of this strategy.

Sustainable management of whale populations is generally considered more difficult than that of fish populations because whales

All of the populations described below would be expected to be growing at or near their maximum rate except

Which factor of population dynamics could not be determined from a cohort life table?

Based on our current knowledge, it appears that the human life span

In the logistic population growth curve shown here, the rate of growth is greatest at which point?

Humans in most countries now have a life expectancy of 75 years or more, compared to 30-40 years in the 1800s.German researchers recently found that the average onset of puberty in 1860 was 16.6 years; by 2010, it had dropped to 10.5.These statistics provide evidence that life history changes with

A population has 150 female and 100 male baboons.During a time period, 45 babies are born.The fecundity of the population for that time period is _______.

The J-shaped exponential population growth curve occurs because the population changes by

In an open population, the population growth rate can be estimated using the equation ∆N = B - D only if

The quadrat method of estimating population size would likely be most appropriate for a population of

Without strict management controls, which of these populations is most likely to be overharvested?

Climate change is altering many aspects of current populations, including the ability to live in their usual habitats; the availability of food, water, and other resources; and even rates of reproduction.The primary type of limitation in this case is

The mark-recapture method would be best suited for estimating the population size of

The poisonous cane toad was introduced to Australia to control cane beetles.It had no effect on the beetles, but in the absence of predators, it has been consuming many other native species.This is an example of

What difference, if any, is there in the management of r-strategist and K-strategist populations?

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 Communication and Multicellularity

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

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

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, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Species Interactions

Communities

Ecosystems

A Changing Biosphere

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