Question 1

Which statement about habitat corridors is true?

Accepted Answer

A)  They are places where an endangered species can live and breed. 
B)  They are usually used in captive breeding studies. 
C)  They exacerbate the deleterious effects of habitat fragmentation. 
D)  They are most effective as a conservation measure for species that disperse little. 
E)  Their presence can mitigate the deleterious effects of habitat fragmentation. 
A)  They are places where an endangered species can live and breed. 
B)  They are usually used in captive breeding studies. 
C)  They exacerbate the deleterious effects of habitat fragmentation. 
D)  They are most effective as a conservation measure for species that disperse little. 
E)  Their presence can mitigate the deleterious effects of habitat fragmentation. E

Question 2

Compared with the Turkana of East Africa,people in the United States have a _______ life expectancy and enter puberty at _______ age.

Accepted Answer

A)  greater;a later 
B)  greater;about the same 
C)  greater;an earlier 
D)  lower;a later 
E)  lower;an earlier 
A)  greater;a later 
B)  greater;about the same 
C)  greater;an earlier 
D)  lower;a later 
E)  lower;an earlier C

Question 3

A captive population of monkeys made up of 130 individuals in the year 1966 has a size of 520 in the year 2010.Assuming that the rate of population growth was constant,the doubling time of this population was _______ years.

Accepted Answer

A)  11 
B)  15 
C)  22 
D)  44 
E)  88 
A)  11 
B)  15 
C)  22 
D)  44 
E)  88 C

Question 4

No-fishing areas help maintain populations of the rockfish Sebastes melanops because these areas

Accepted Answer

A)  increase dispersal rates between subpopulations. 
B)  allow some females to grow large. 
C)  allow some males to grow large. 
D)  reduce disease risk. 
E)  keep fish small. 
A)  increase dispersal rates between subpopulations. 
B)  allow some females to grow large. 
C)  allow some males to grow large. 
D)  reduce disease risk. 
E)  keep fish small.

Question 5

Use the following to answer questions :
In a population of 1,250 aphids,50 died on a particular day,while 25 were born.
-What is the per capita death rate for that day?

Accepted Answer

A)  0.02 
B)  0.04 
C)  0.05 
D)  0.06 
E)  0.08 
A)  0.02 
B)  0.04 
C)  0.05 
D)  0.06 
E)  0.08

Question 6

Which factor would most likely limit the size of a population?

Accepted Answer

A)  An increase in the population growth rate as density increases 
B)  A decrease in the population growth rate as density increases 
C)  A decrease in mortality as density increases 
D)  Multiplicative growth 
E)  Additive growth 
A)  An increase in the population growth rate as density increases 
B)  A decrease in the population growth rate as density increases 
C)  A decrease in mortality as density increases 
D)  Multiplicative growth 
E)  Additive growth

Question 7

If four hundred robins are found in a ten-hectare plot,the density of robins in that plot is _______ robins/ha.

Accepted Answer

A)  10 
B)  14 
C)  40 
D)  400 
E)  4,000 
A)  10 
B)  14 
C)  40 
D)  400 
E)  4,000

Question 8

What is the approximate carrying capacity (per cubic centimeter)?

Accepted Answer

A)  7,500 
B)  15,000 
C)  30,000 
D)  60,000 
E)  90,000 
A)  7,500 
B)  15,000 
C)  30,000 
D)  60,000 
E)  90,000

Question 9

What is the per capita rate of increase for that day?

Accepted Answer

A)  -0.02 
B)  0 
C)  0.02 
D)  0.04 
E)  0.06 
A)  -0.02 
B)  0 
C)  0.02 
D)  0.04 
E)  0.06

Question 10

Suppose you are in an area where Lyme disease is prevalent.There is a decrease in the size of the acorn crop.This change will most likely lead to a(n)_______ in the incidence of Lyme disease because there is a decrease in the size of _______ populations.

Accepted Answer

A)  increase;deer 
B)  increase;rodent 
C)  increase;bird 
D)  decrease;rodent 
E)  decrease;deer 
A)  increase;deer 
B)  increase;rodent 
C)  increase;bird 
D)  decrease;rodent 
E)  decrease;deer

Question 11

In order to determine population density,a researcher _______ the number of individuals in the population by the area of the space covered by the population.

Accepted Answer

The answer of In order to determine population density,a researcher...

Question 12

In the BIDE model of population growth,the "E" stands for

Accepted Answer

A)  ecology. 
B)  emigration. 
C)  extinction. 
D)  environmental. 
E)  evolutionary. 
A)  ecology. 
B)  emigration. 
C)  extinction. 
D)  environmental. 
E)  evolutionary.

Question 13

Use the following to answer questions :
In a population of 400 gray foxes,the per capita birth rate in a particular time period is 0.07 and the per capita death rate is 0.14.
-The per capita growth rate of this population is

Accepted Answer

A)  negative. 
B)  0.07. 
C)  0.14. 
D)  0.21. 
E)  28. 
A)  negative. 
B)  0.07. 
C)  0.14. 
D)  0.21. 
E)  28.

Question 14

The population densities of skunks in western Massachusetts vary considerably from year to year;therefore,skunk density is

Accepted Answer

A)  at equilibrium. 
B)  density dependent. 
C)  dynamic. 
D)  a metapopulation. 
E)  at carrying capacity. 
A)  at equilibrium. 
B)  density dependent. 
C)  dynamic. 
D)  a metapopulation. 
E)  at carrying capacity.

Question 15

Which factor is most likely to cause an increase in the carrying capacity of a population?

Accepted Answer

A)  An increase in food supply 
B)  An increase in the potential birth rate 
C)  An increase in the resource requirement per individual 
D)  An increase in stress 
E)  An increase in predation 
A)  An increase in food supply 
B)  An increase in the potential birth rate 
C)  An increase in the resource requirement per individual 
D)  An increase in stress 
E)  An increase in predation

Question 16

Which statement about life histories is false?

Accepted Answer

A)  They are quantitative descriptions of life cycles. 
B)  They include the time course of growth and development. 
C)  They include the time course of reproduction. 
D)  Information about life histories can be summarized in a life table. 
E)  Life histories do not vary within a single species. 
A)  They are quantitative descriptions of life cycles. 
B)  They include the time course of growth and development. 
C)  They include the time course of reproduction. 
D)  Information about life histories can be summarized in a life table. 
E)  Life histories do not vary within a single species.

Question 17

Which statement about carrying capacity (K)is true?

Accepted Answer

A)  When N = K,the birth rate in a population is necessarily zero. 
B)  The rate of population growth in an unlimited environment is proportional to K. 
C)  At K,the population must have a negative growth rate. 
D)  At K,the population must have a positive growth rate. 
E)  In a population at its K,the birth rate equals the death rate. 
A)  When N = K,the birth rate in a population is necessarily zero. 
B)  The rate of population growth in an unlimited environment is proportional to K. 
C)  At K,the population must have a negative growth rate. 
D)  At K,the population must have a positive growth rate. 
E)  In a population at its K,the birth rate equals the death rate.

Question 18

Which statement about population growth is true?

Accepted Answer

A)  If the per capita birth rate and the death rate remain constant,the population will grow additively. 
B)  A population growing additively will not have a consistent doubling time. 
C)  With additive growth,populations generate large numbers much more quickly than they do with multiplicative growth. 
D)  The series 10,15,20,25,30,35 represents multiplicative growth. 
E)  The series 1,2,4,8,16,32,64 represents additive growth. 
A)  If the per capita birth rate and the death rate remain constant,the population will grow additively. 
B)  A population growing additively will not have a consistent doubling time. 
C)  With additive growth,populations generate large numbers much more quickly than they do with multiplicative growth. 
D)  The series 10,15,20,25,30,35 represents multiplicative growth. 
E)  The series 1,2,4,8,16,32,64 represents additive growth.

Question 19

A rodent species that once experienced much predation now has lower predation risk.As a consequence,the mortality of maturing individuals is reduced.What will be the most likely response to a reduction in mortality?

Accepted Answer

A)  A shift to later reproduction with the benefit of higher fecundity,because individuals are larger 
B)  A shift to later reproduction at the expense of lower fecundity,because individuals are smaller 
C)  A shift to earlier reproduction at the expense of lower fecundity,because individuals are smaller 
D)  A shift to later reproduction with the benefit of higher fecundity,because individuals are smaller 
E)  A shift to earlier reproduction at the expense of lower fecundity,because individuals are larger 
A)  A shift to later reproduction with the benefit of higher fecundity,because individuals are larger 
B)  A shift to later reproduction at the expense of lower fecundity,because individuals are smaller 
C)  A shift to earlier reproduction at the expense of lower fecundity,because individuals are smaller 
D)  A shift to later reproduction with the benefit of higher fecundity,because individuals are smaller 
E)  A shift to earlier reproduction at the expense of lower fecundity,because individuals are larger

Question 20

For which population would biologists most likely measure population density in terms of number per unit of volume rather than number per unit of area?

Accepted Answer

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

Exam 42: Populations

Which statement about habitat corridors is true?

Compared with the Turkana of East Africa,people in the United States have a _______ life expectancy and enter puberty at _______ age.

A captive population of monkeys made up of 130 individuals in the year 1966 has a size of 520 in the year 2010.Assuming that the rate of population growth was constant,the doubling time of this population was _______ years.

No-fishing areas help maintain populations of the rockfish Sebastes melanops because these areas

Use the following to answer questions : In a population of 1,250 aphids,50 died on a particular day,while 25 were born. -What is the per capita death rate for that day?

Which factor would most likely limit the size of a population?

If four hundred robins are found in a ten-hectare plot,the density of robins in that plot is _______ robins/ha.

What is the approximate carrying capacity (per cubic centimeter)?

What is the per capita rate of increase for that day?

Suppose you are in an area where Lyme disease is prevalent.There is a decrease in the size of the acorn crop.This change will most likely lead to a(n)_______ in the incidence of Lyme disease because there is a decrease in the size of _______ populations.

In order to determine population density,a researcher _______ the number of individuals in the population by the area of the space covered by the population.

In the BIDE model of population growth,the "E" stands for

Use the following to answer questions : In a population of 400 gray foxes,the per capita birth rate in a particular time period is 0.07 and the per capita death rate is 0.14. -The per capita growth rate of this population is

The population densities of skunks in western Massachusetts vary considerably from year to year;therefore,skunk density is

Which factor is most likely to cause an increase in the carrying capacity of a population?

Which statement about life histories is false?

Which statement about carrying capacity (K)is true?

Which statement about population growth is true?

A rodent species that once experienced much predation now has lower predation risk.As a consequence,the mortality of maturing individuals is reduced.What will be the most likely response to a reduction in mortality?

For which population would biologists most likely measure population density in terms of number per unit of volume rather than number per unit of area?

Introduction

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cells: the Working Units of Life

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Reproduction

Animal Development

Immunology: Animal Defense Systems

Animal Behavior

The Distribution of Earths Ecological Systems

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

Compared with the Turkana of East Africa,people in the United States have a _ life expectancy and enter puberty at _ age.

Suppose you are in an area where Lyme disease is prevalent.There is a decrease in the size of the acorn crop.This change will most likely lead to a(n)_ in the incidence of Lyme disease because there is a decrease in the size of _ populations.