Question 1

A population that is growing exponentially in the absence of limiting factors can be illustrated by which curve?

Accepted Answer

A)  S-shaped 
B)  J-shaped 
C)  O-shaped 
D)  bimodal 
E)  skewed 
A)  S-shaped 
B)  J-shaped 
C)  O-shaped 
D)  bimodal 
E)  skewed B

Question 2

A population ecologist wants to estimate the size of a robin population.In an apple orchard,she captures 10 robins,marks them,and then releases them.She returns several weeks later and captures another 10 robins of which 2 are robins she previously marked.The estimated population size of robins is

Accepted Answer

A)  50 
B)  15 
C)  10 
D)  200 
E)  20 
A)  50 
B)  15 
C)  10 
D)  200 
E)  20 A

Question 3

Elephants can live for between 50 and 70 years and a cow (female elephant)typically gives birth to 3 or 4 calves.What type of survivorship curve applies to them?

Accepted Answer

A)  type I 
B)  type II 
C)  type III 
D)  none of these types 
E)  more than one of these types 
A)  type I 
B)  type II 
C)  type III 
D)  none of these types 
E)  more than one of these types A

Question 4

An epidemic facilitated by a high,dense population is an example of a ___ factor.

Accepted Answer

A)  density-dependent 
B)  density-independent 
C)  biotic 
D)  logistic 
E)  exponential 
A)  density-dependent 
B)  density-independent 
C)  biotic 
D)  logistic 
E)  exponential

Question 5

Which of the following situations would NOT result in a clumped population distribution?

Accepted Answer

A)  zebras form herds to protect themselves from predators 
B)  oak seeds do not fall far from their parent tree 
C)  rotifer populations growing in a pond reproduce asexually 
D)  in a dense population, penguins maintain a certain space between neighborhoods to avoid aggression and protect their territory 
E)  all of these situations would result in a clumped population distribution 
A)  zebras form herds to protect themselves from predators 
B)  oak seeds do not fall far from their parent tree 
C)  rotifer populations growing in a pond reproduce asexually 
D)  in a dense population, penguins maintain a certain space between neighborhoods to avoid aggression and protect their territory 
E)  all of these situations would result in a clumped population distribution

Question 6

The most common type of population distribution is

Accepted Answer

A)  clumped. 
B)  uniform. 
C)  random. 
D)  near-uniform. 
E)  semi-random. 
A)  clumped. 
B)  uniform. 
C)  random. 
D)  near-uniform. 
E)  semi-random.

Question 7

Feces from Canadian geese can

Accepted Answer

A)  soil shoes. 
B)  stain clothes. 
C)  pollute bodies of water. 
D)  cause infections. 
E)  cause all of these. 
A)  soil shoes. 
B)  stain clothes. 
C)  pollute bodies of water. 
D)  cause infections. 
E)  cause all of these.

Question 8

A cohort is

Accepted Answer

A)  a collection of same-aged individuals of the same species. 
B)  any member of the same species. 
C)  any member of the same species and sex within a population. 
D)  a sexual mate. 
E)  a litter mate or sibling within a large population. 
A)  a collection of same-aged individuals of the same species. 
B)  any member of the same species. 
C)  any member of the same species and sex within a population. 
D)  a sexual mate. 
E)  a litter mate or sibling within a large population.

Question 9

Which of the following is NOT a factor that has led to a dramatic increase in the human population?

Accepted Answer

A)  increase in the carrying capacity 
B)  increased reproductive life expectancy 
C)  human invasion of new habitats and climatic zones 
D)  a reversal from K-selected reproduction to r-selected reproduction 
E)  the development of public health and the germ theory of diseases 
A)  increase in the carrying capacity 
B)  increased reproductive life expectancy 
C)  human invasion of new habitats and climatic zones 
D)  a reversal from K-selected reproduction to r-selected reproduction 
E)  the development of public health and the germ theory of diseases

Question 10

Classification.Answer the questions in reference to the seven terms listed below that are used by ecologists.
 a.density-dependent factor
b.demographic transitional stage
c.type I survivorship
d.r-selected species
e.biotic potential
f.density-independent factor
g.logistic growth
-Elephants,humans,and dogs all fit into this model

Accepted Answer

The answer of Classification.Answer the questions in reference to the...

Question 11

As population density increases,the chance of ____ also increases.

Accepted Answer

A)  pathogens 
B)  parasitism 
C)  predation 
D)  competition 
E)  all of these 
A)  pathogens 
B)  parasitism 
C)  predation 
D)  competition 
E)  all of these

Question 12

Biotic potential

Accepted Answer

A)  varies from one species to another. 
B)  is controlled by the timing of the first reproduction. 
C)  is controlled by the frequency of reproduction. 
D)  is controlled by the number of offspring produced. 
E)  is true of all of these. 
A)  varies from one species to another. 
B)  is controlled by the timing of the first reproduction. 
C)  is controlled by the frequency of reproduction. 
D)  is controlled by the number of offspring produced. 
E)  is true of all of these.

Question 13

Guppies preyed upon by Killifish are __ species.

Accepted Answer

A)  type I 
B)  K-selected 
C)  type II 
D)  r-selected 
E)  more than one of these types of 
A)  type I 
B)  K-selected 
C)  type II 
D)  r-selected 
E)  more than one of these types of

Question 14

Classification.Answer the questions in reference to the seven terms listed below that are used by ecologists.
 a.density-dependent factor
b.demographic transitional stage
c.type I survivorship
d.r-selected species
e.biotic potential
f.density-independent factor
g.logistic growth
-Pandemics are examples of this

Accepted Answer

The answer of Classification.Answer the questions in reference to the...

Question 15

If the effects of death are imposed on the birth rate of a population,

Accepted Answer

A)  the growth rate will slow down. 
B)  the time scale of population growth changes. 
C)  eventually, as the environment is overexploited, deaths will exceed births. 
D)  an exponential growth curve will be produced if births exceed deaths at a constant level. 
E)  all of these will occur. 
A)  the growth rate will slow down. 
B)  the time scale of population growth changes. 
C)  eventually, as the environment is overexploited, deaths will exceed births. 
D)  an exponential growth curve will be produced if births exceed deaths at a constant level. 
E)  all of these will occur.

Question 16

A population ecologist is study the demographics of American bison living on a grassland in North Dakota.She captures,marks,and releases 100 bison.Later,she recaptures 100 bison and discovers that 50 were previously marked and half of those marked are of reproductive age.What is the population ecologist's estimate of how many bison in the total population are of reproductive age?

Accepted Answer

A)  200 
B)  50 
C)  100 
D)  20 
E)  10 
A)  200 
B)  50 
C)  100 
D)  20 
E)  10

Question 17

Examine the figure above and answer the following question(s).
-During the third phase "3",the population growth slows and then levels off because

Accepted Answer

A)  essential resources become scarce. 
B)  the carrying capacity has been reached. 
C)  competition for food becomes increasingly important. 
D)  predators eat fawns as they are born. 
E)  all of these occur except "predators eat fawns as they are born." 
A)  essential resources become scarce. 
B)  the carrying capacity has been reached. 
C)  competition for food becomes increasingly important. 
D)  predators eat fawns as they are born. 
E)  all of these occur except "predators eat fawns as they are born."

Question 18

Type I survivorship curves

Accepted Answer

A)  are characteristics of humans and elephants. 
B)  typify a population in which all ages have an equal chance of survival. 
C)  indicate a high mortality rate in the very young. 
D)  show that very few young are produced, that each is given parental support, and that most individuals live a relatively long life and die of old age. 
E)  are typical of annual plants. 
A)  are characteristics of humans and elephants. 
B)  typify a population in which all ages have an equal chance of survival. 
C)  indicate a high mortality rate in the very young. 
D)  show that very few young are produced, that each is given parental support, and that most individuals live a relatively long life and die of old age. 
E)  are typical of annual plants.

Question 19

A change in a population that is NOT related strictly to the size of the population is best described as

Accepted Answer

A)  density-dependent. 
B)  density-independent. 
C)  biotic. 
D)  logistic. 
E)  exponential. 
A)  density-dependent. 
B)  density-independent. 
C)  biotic. 
D)  logistic. 
E)  exponential.

Question 20

Match the following letters with the number with which they best correspond.
 a.population density
b.population growth rate
c.carrying capacity
d.limiting factor
e.age structure
f.ecological footprint
-the number of organisms of a particular population in a given area

Accepted Answer

The answer of Match the following letters with the number...

Exam 16: Population Ecology

A population that is growing exponentially in the absence of limiting factors can be illustrated by which curve?

A population ecologist wants to estimate the size of a robin population.In an apple orchard,she captures 10 robins,marks them,and then releases them.She returns several weeks later and captures another 10 robins of which 2 are robins she previously marked.The estimated population size of robins is

Elephants can live for between 50 and 70 years and a cow (female elephant)typically gives birth to 3 or 4 calves.What type of survivorship curve applies to them?

An epidemic facilitated by a high,dense population is an example of a ___ factor.

Which of the following situations would NOT result in a clumped population distribution?

The most common type of population distribution is

Feces from Canadian geese can

A cohort is

Which of the following is NOT a factor that has led to a dramatic increase in the human population?

As population density increases,the chance of ____ also increases.

Biotic potential

Guppies preyed upon by Killifish are __ species.

If the effects of death are imposed on the birth rate of a population,

Examine the figure above and answer the following question(s). -During the third phase "3",the population growth slows and then levels off because

Type I survivorship curves

A change in a population that is NOT related strictly to the size of the population is best described as

Match the following letters with the number with which they best correspond. a.population density b.population growth rate c.carrying capacity d.limiting factor e.age structure f.ecological footprint -the number of organisms of a particular population in a given area

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

DNA Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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