Question 1

A(n)_______ consists of all the populations of multiple species interacting in a designated region.

Accepted Answer

A) ecosystem 
B) community 
C) biosphere 
D) None of the choices are correct. 
A) ecosystem 
B) community 
C) biosphere 
D) None of the choices are correct. B

Question 2

Only the LDC's will be experiencing overpopulation growth in the near future.

Accepted Answer

A) True 
 B)False  False

Question 3

The deceleration phase of growth always precedes the stable equilibrium phase in exponential growth.

Accepted Answer

A) True 
 B)False  False

Question 4

Many species are held below the environmental carrying capacity by predation.

Accepted Answer

A) True 
 B)False

Question 5

How is environmental impact measured in a population?

Accepted Answer

A) Population size and resource consumption. 
B) Population size and resource production. 
C) Number of individuals dying each generation plus birth rates. 
D) All of these are used to measure environmental impact. 
E) None of these are used to measure environmental impact. 
A) Population size and resource consumption. 
B) Population size and resource production. 
C) Number of individuals dying each generation plus birth rates. 
D) All of these are used to measure environmental impact. 
E) None of these are used to measure environmental impact.

Question 6

A population in which death rates are higher than birth rates,and the prereproductive group is smaller than the reproductive group,is best represented by an age structure diagram with a(n)______ -shape.

Accepted Answer

A) bell 
B) urn 
C) pyramid 
D) S 
E) J 
A) bell 
B) urn 
C) pyramid 
D) S 
E) J

Question 7

Early this spring researchers have recently discovered that there is one small remnant population of endangered bluegrass left in a small prairie plot outside of Kansas City.If there are approximately 850 individuals in the cohort,how many individuals can the researchers expect to find alive at the end of the summer,6 months later?

Accepted Answer

A) Approximately 1000 
B) Approximately 330 
C) Approximately 700 
D) Approximately 45 
E) None of the individuals will be alive 6 months later. 
A) Approximately 1000 
B) Approximately 330 
C) Approximately 700 
D) Approximately 45 
E) None of the individuals will be alive 6 months later.

Question 8

In trying to limit the growth of a pest,you will have more success if you can reduce the carrying capacity of the environment rather than reduce the population size of the pest.

Accepted Answer

A) True 
 B)False

Question 9

A type II survivorship curve,drawn by plotting the number of individuals in a given population alive at the beginning of each age interval,is characterized by

Accepted Answer

A) most individuals dying of old age. 
B) many individuals dying early in life. 
C) individuals dying at a constant rate throughout time. 
D) most individuals dying during their reproductive years. 
A) most individuals dying of old age. 
B) many individuals dying early in life. 
C) individuals dying at a constant rate throughout time. 
D) most individuals dying during their reproductive years.

Question 10

Which of the following factor(s)limit(s)exponential growth of a population?

Accepted Answer

A) limited resource availability 
B) increases in predator populations 
C) competition between members 
D) competition with other species 
E) All of these choices limit exponential growth. 
A) limited resource availability 
B) increases in predator populations 
C) competition between members 
D) competition with other species 
E) All of these choices limit exponential growth.

Question 11

Which variable is not a density-dependent factor?

Accepted Answer

A) Competition between two male deer for territory. 
B) A red tailed hawk preying upon a population of field mice. 
C) Small pox outbreaks during the 1800's. 
D) An early cold spell that causes the plants in a given area to die off earlier than normal. 
A) Competition between two male deer for territory. 
B) A red tailed hawk preying upon a population of field mice. 
C) Small pox outbreaks during the 1800's. 
D) An early cold spell that causes the plants in a given area to die off earlier than normal.

Question 12

When the number of births plus immigration exceeds the number of deaths plus emigration,a population size will increase.

Accepted Answer

A) True 
 B)False

Question 13

All of the following statements about population distribution are true EXCEPT

Accepted Answer

A) population distribution is the pattern of dispersal of individuals across an area of interest. 
B) environmental conditions,such as climate and altitude,are often limiting factors of distribution. 
C) a population's distribution is calculated as the number of individuals per unit area. 
D) behavioral traits,such as territoriality,can affect the distribution pattern of a population. 
A) population distribution is the pattern of dispersal of individuals across an area of interest. 
B) environmental conditions,such as climate and altitude,are often limiting factors of distribution. 
C) a population's distribution is calculated as the number of individuals per unit area. 
D) behavioral traits,such as territoriality,can affect the distribution pattern of a population.

Question 14

If the members of a population are small in size,mature early,and have high parity and fecundity,they are ______.

Accepted Answer

A) K-strategists 
B) r-strategists 
C) neither K-strategists nor r-strategists,but have characteristics of both. 
A) K-strategists 
B) r-strategists 
C) neither K-strategists nor r-strategists,but have characteristics of both.

Question 15

Most species are intermediate between r-strategists and K-strategists,and tend to have a type II survivorship curve.

Accepted Answer

A) True 
 B)False

Question 16

The basic level of an ecological study always begins by looking at how populations interact with each other.

Accepted Answer

A) True 
 B)False

Question 17

Farmers sprayed leechi trees to suppress populations of scale insects.This also killed the populations of a predatory lacewing that controlled the numbers of scales.Soon the spraying did no good,and the damage to the leechi from the scales was greater than before spraying had occurred.Few predatory lacewings exist in the trees now because

Accepted Answer

A) they,too,are insects so they are r-selected. 
B) the scale insect was K-selected and the high number of young included a resistant strain,while the predator was r-selected and will take longer to produce a resistant variety. 
C) the predator was r-selected and was therefore more susceptible to the spray. 
D) the scale insect was r-selected and the high number of young included a resistant strain; the predator was K-selected and will take longer to produce a resistant variety. 
A) they,too,are insects so they are r-selected. 
B) the scale insect was K-selected and the high number of young included a resistant strain,while the predator was r-selected and will take longer to produce a resistant variety. 
C) the predator was r-selected and was therefore more susceptible to the spray. 
D) the scale insect was r-selected and the high number of young included a resistant strain; the predator was K-selected and will take longer to produce a resistant variety.

Question 18

A pond represents a(n)_______ while the minnows represent a(n)______.

Accepted Answer

A) population; community 
B) population; ecosystem 
C) ecosystem; population 
D) community; population 
E) ecosystem; community 
A) population; community 
B) population; ecosystem 
C) ecosystem; population 
D) community; population 
E) ecosystem; community

Question 19

Dandelions and tent caterpillars,which are r-strategists,are examples of opportunistic species that tend to move in high numbers and rapidly occupy new environments.

Accepted Answer

A) True 
 B)False

Question 20

Since the population of the LDCs is still growing at a significant rate,one would correctly assume that the LDCs consume a much larger proportion of the Earth's resources.

Accepted Answer

A) True 
 B)False

Exam 44: Population Ecology

A(n)_______ consists of all the populations of multiple species interacting in a designated region.

Only the LDC's will be experiencing overpopulation growth in the near future.

The deceleration phase of growth always precedes the stable equilibrium phase in exponential growth.

Many species are held below the environmental carrying capacity by predation.

How is environmental impact measured in a population?

A population in which death rates are higher than birth rates,and the prereproductive group is smaller than the reproductive group,is best represented by an age structure diagram with a(n)______ -shape.

In trying to limit the growth of a pest,you will have more success if you can reduce the carrying capacity of the environment rather than reduce the population size of the pest.

A type II survivorship curve,drawn by plotting the number of individuals in a given population alive at the beginning of each age interval,is characterized by

Which of the following factor(s)limit(s)exponential growth of a population?

Which variable is not a density-dependent factor?

When the number of births plus immigration exceeds the number of deaths plus emigration,a population size will increase.

All of the following statements about population distribution are true EXCEPT

If the members of a population are small in size,mature early,and have high parity and fecundity,they are ______.

Most species are intermediate between r-strategists and K-strategists,and tend to have a type II survivorship curve.

The basic level of an ecological study always begins by looking at how populations interact with each other.

A pond represents a(n)_______ while the minnows represent a(n)______.

Dandelions and tent caterpillars,which are r-strategists,are examples of opportunistic species that tend to move in high numbers and rapidly occupy new environments.

Since the population of the LDCs is still growing at a significant rate,one would correctly assume that the LDCs consume a much larger proportion of the Earth's resources.

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Photosynthesis

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development

Behavioral Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

Filters

A pond represents a(n)_ while the minnows represent a(n).