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Biology, 6/e
Author Dr. George B. Johnson, Washington University
Author Dr. Peter H. Raven, Missouri Botanical Gardens & Washington University
Contributor Dr. Susan Singer, Carleton College
Contributor Dr. Jonathan Losos, Washington University
Population Ecology

Multiple Choice Quiz

Please answer all questions



1

Which distribution pattern does territoriality produce?
A)random
B)uniform
C)clumped
D)None of the above. Territoriality isn't important in determining distribution patterns.
2

A metapopulation is
A)a population in an urban area
B)a network of distinct and non-interacting species
C)a population that constantly occupies all suitable habitats in an area
D)a network of distinct but interacting species
3

The mortality rate of organisms following a type III survivorship curve is
A)fairly constant throughout life
B)higher in post-reproductive years
C)lower after the organisms become established
D)unrelated to age
4

Organisms whose life history adaptation is called semelparity
A)produce young only late in life
B)produce a large batch of young and die
C)produce young over most of their life
D)produce a single offspring near the end of their reproductive potential
5

Which of the following is not an outcome of high population density?
A)toxic waste accumulation
B)mortality increase
C)predators tend to ignore prey that is overabundant
D)reproduction reduction
6

The statistical study of populations is called
A)density
B)fecundity
C)dispersion
D)mortality
E)demography
7

What type of survivorship curve do humans have?
A)Type I
B)Type II
C)Type III
D)Type IV
E)none of the above
8

Which dispersion pattern is most common in nature?
A)randomly spaced
B)uniformly spaced
C)clumped
D)all are equally common
E)none of these are found in nature
9

r strategists tend to have
A)few offspring
B)little parental care
C)sigmoid growth curves
D)all of the above
E)none of the above
10

The number of individuals that a particular place can support indefinitely is called the
A)biotic potential
B)survivorship
C)cohort
D)carrying capacity
E)community
11

To obtain optimal yield, populations should be harvested at what part of the sigmoid growth curve?
A)the very beginning
B)the steep part
C)where it levels off
D)it doesn't make any difference
E)populations should never be harvested
12

A community plus the nonliving factors with which it interacts is called a(n)
A)ecosystem
B)age structure
C)biome
D)population
E)cohort
13

Which of the following populations is most likely to go extinct?
A)a very small population in an unstable environment
B)a moderate-sized population of r strategists
C)a large population with lots of genetic variability
D)all would be equally likely to go extinct
14

The number of individuals per unit area determines the population's
A)survivorship
B)mortality
C)age distribution
D)density
E)fundamental niche
15

In the formula for biotic potential (dN/dt = riN), what does N stand for?
A)the carrying capacity of the environment
B)the change in time
C)the number of individuals in the population
D)the intrinsic rate of natural increase of the population
E)the age distribution of the population
16

Which of the following factors will affect population growth rates?
A)net emigration
B)net immigration
C)birth rate
D)all of the above
E)none of the above
17

During exponential growth,
A)the number of individuals in a population increases rapidly
B)the rate of increase fluctuates
C)the curve on the graph levels off
D)all of the above
E)none of the above
18

When members of a population move out of a given area, it is called
A)survivorship
B)immigration
C)mortality
D)demography
E)emigration
19

What causes a sigmoid growth curve to level off?
A)the population stops reproducing
B)mortality decreases in the population
C)the population shifts from a clumped to a uniformly spaced dispersion
D)the population reaches the environmental carrying capacity
E)sigmoid growth curves never level off
20

What type of effect has an increasing impact as the population size increases?
A)density-independent effect
B)cohort effect
C)age effect
D)survivorship effect
E)density-dependent effect
21

What is the size of the human population today?
A)over 10 billion
B)almost 6 billion
C)less than 2 billion
D)just under 1 billion
E)less than 4 million
22

What type of population would be associated with a population pyramid that had an extremely broad base?
A)a rapidly expanding population
B)a stable population
C)a population where the birth rate equaled the death rate
D)a population where there were more old individuals than young individuals
E)a population with more males than females
23

In this chapter, glanville fritillary butterflies are used as an example of a species with
A)a Type II survivorship curve
B)a uniformly spaced population
C)K selected adaptations
D)metapopulations
E)a high cost of reproduction (CR)
24

If the life history pattern for a species is to reproduce once and then die, it is called
A)fecundity
B)iteroparity
C)semelparity
D)density-dependent
E)density-independent
25

The pattern of dispersion known as ________________ probably results from a form of antagonism occurring between individuals.
A)random dispersion
B)uniform dispersion
C)clustered dispersion
D)patchy dispersion
26

When does the growth rate of a natural population equal zero?
A)when N/K is exactly one
B)when N nears the carrying capacity of the habitat
C)when N/K equals zero
D)when mortality is greater than natality
27

Choose the factor that is unlikely to limit population growth.
A)predation
B)harsh weather
C)disease
D)All are factors that could limit population growth.
28

Which of these is not a density-dependent factor that could act to limit population growth as population size increases?
A)waste accumulation
B)fire
C)inhibitory pheromones
D)lowered immune function due to stress
29

A _______________ survivorship curve is most typical of an opportunistic species.
A)type I
B)type II
C)type III
D)All of these are typical of opportunistic species.
30

Even though humans are animals, it is unlikely that humans will exhibit symptoms of overcrowding seen in other species.
A)True
B)False
31

The number of individuals that can be supported in a given location is the:
A)density-dependent effect
B)realized rate of population increase
C)biotic potential
D)innate capacity for increase
E)none of the above
32

An example of an organism fitting a type I survivorship curve is:
A)an oyster
B)a human being
C)a hydra
D)lizards
E)none of the above
33

Clumped patterns of dispersion are indicative of an environment in which resources are unevenly distributed.
A)True
B)False
34

The sigmoid growth curve is characteristic of most survivorship curves.
A)True
B)False








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