Question 1

Which of the following is true regarding quadrats?

Accepted Answer

A)  A full population count is usually impractical.
B)  Quadrats are plots of land of the same size and shape that can be used to randomly count a single non-migrating species.
C)  Once several quadrats are counted, an estimate of number of a particular organism can be extrapolated for a given land mass.
D)  Sampling error is common if the size of the quadrats is not large.
E)  All of these are correct.

Question 2

Which of the following is NOT true regarding biotic potential? It

Accepted Answer

A)  varies from one species to another.
B)  is related to the timing of the first reproduction.
C)  is related to the frequency of reproduction.
D)  is related to the number of offspring produced.
E)  increases as population density increases.

Question 3

The average number of individuals in a specified portion of habitat is the population's

Accepted Answer

A)  distribution.
B)  carrying capacity.
C)  density.
D)  size.
E)  birth rate.

Question 4

A population of wolf spiders exemplifies a __________ population distribution.

Accepted Answer

A)  clumped
B)  random
C)  uniform
D)  constant
E)  homogeneous

Question 5

The distribution of social animals is likely to be

Accepted Answer

A)  clumped.
B)  random.
C)  uniform.
D)  constant.
E)  homogeneous.

Question 6

The work of Reznick and Endler with guppies shows all of the following EXCEPT that

Accepted Answer

A)  life history traits can be inherited.
B)  life history traits evolve.
C)  life history traits can be altered over a short period of time.
D)  predation does not influence the modification of life history traits.
E)  life history traits are coded for in DNA.

Question 7

The effect of resource availability on population size determines

Accepted Answer

A)  the carrying capacity of the environment.
B)  exponential growth.
C)  the doubling time of a population.
D)  the population's biotic potential.
E)  all of these.

Question 8

Limiting factors

Accepted Answer

A)  produce more pronounced effects as a population grows.
B)  prevent indefinite, exponential population growth.
C)  can be either density-dependent or density-independent.
D)  acting together constitute environmental resistance to population growth.
E)  include all of these.

Question 9

The size of a population is affected by all of the following EXCEPT

Accepted Answer

A)  biotic potential.
B)  trophic level.
C)  carrying capacity of the environment.
D)  death rate.
E)  birth rate.

Question 10

Biotic potential is controlled by all of the following factors EXCEPT

Accepted Answer

A)  the age of individuals within the population.
B)  the resources available for each individual.
C)  fecundity rate.
D)  environmental disturbances.
E)  all of these control biotic potential.

Question 11

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

Accepted Answer

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

Question 12

Organisms that demonstrate type I survivorship are characterized by

Accepted Answer

A)  high r, small offspring.
B)  low r, small offspring.
C)  low r, large offspring.
D)  high r, large offspring.
E)  low r, large population size.

Question 13

Questions refer to the figure above illustrating logistic growth.
 
-The effect of population growth limiting factors begin to become evident at about

Accepted Answer

A)  A.
B)  B.
C)  C.
D)  D.
E)  E.

Question 14

Population size is related to

Accepted Answer

A)  deaths.
B)  births.
C)  migration.
D)  immigration.
E)  all of these.

Question 15

All of the following may be involved in feedback mechanisms in natural communities when populations become too dense EXCEPT

Accepted Answer

A)  density-dependent factors.
B)  limiting factors.
C)  biotic potential.
D)  physical factors.
E)  biotic factors.

Question 16

A cohort is

Accepted Answer

A)  a group of individuals of the same species born during the same time interval.
B)  any member of the same species.
C)  a group of individuals with the same parents.
D)  a group of individuals of the same sex.
E)  any group of closely related individuals.

Question 17

A J-shaped population growth curve becomes an S-shaped one

Accepted Answer

A)  as more resources become available.
B)  if the data are plotted on semi-log graph paper.
C)  as the carrying capacity is reached.
D)  if reproduction stops.
E)  if any of these occur.

Question 18

Which of the following is NOT true for a population growing exponentially?

Accepted Answer

A)  The number of individuals added to the population in a year is greater than it was the previous year.
B)  The population growth rate increases year after year.
C)  Its r remains constant in the short-run.
D)  The doubling time remains constant.
E)  All of these are NOT true.

Question 19

Reznick and Endler were interested in the effects of __________ on guppy evolution.

Accepted Answer

A)  predation
B)  competition
C)  population density
D)  density-independent factors
E)  mating rituals

Question 20

The distribution of highly competitive animals is likely to be

Accepted Answer

A)  clumped.
B)  random.
C)  uniform.
D)  constant.
E)  homogeneous.

Exam 45: Population Ecology

Organisms that demonstrate type I survivorship are characterized by

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All of the following may be involved in feedback mechanisms in natural communities when populations become too dense EXCEPT

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Population size is related to

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A population of wolf spiders exemplifies a __________ population distribution.

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Biotic potential is controlled by all of the following factors EXCEPT

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Which of the following is NOT true for a population growing exponentially?

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Reznick and Endler were interested in the effects of __________ on guppy evolution.

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The distribution of highly competitive animals is likely to be

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The effect of resource availability on population size determines

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The size of a population is affected by all of the following EXCEPT

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The average number of individuals in a specified portion of habitat is the population's

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A J-shaped population growth curve becomes an S-shaped one

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

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Limiting factors

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Which of the following is NOT true regarding biotic potential? It

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Questions refer to the figure above illustrating logistic growth. -The effect of population growth limiting factors begin to become evident at about

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The work of Reznick and Endler with guppies shows all of the following EXCEPT that

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A cohort is

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Which of the following is true regarding quadrats?

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The distribution of social animals is likely to be

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