1521215
Beschreibung
Quiz von Laurel McLaughlin, aktualisiert more than 1 year ago
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Erstellt von Laurel McLaughlin
vor etwa 10 Jahre
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Frage 1
Frage
In exponential population growth, r increases as population size increases.
Antworten
- True
- False
Frage 2
Frage
Population growth rates are usually close to r(max).
Antworten
- True
- False
Frage 3
Frage
If r=0.2 for a population, population size is:
Antworten
-
decreasing
-
neither; r does not indicate population growth
-
increasing
-
stable
Frage 4
Frage
Carrying capacity, or K, is:
Antworten
-
variable in time and space
-
an indicator of fecundity
-
fixed for each population
-
a feature of exponential population growth
Frage 5
Frage
Logistic population growth is density-dependent.
Antworten
- True
- False
Frage 6
Frage
Population growth rate can be defined as:
Antworten
-
change in number of individuals per unit time
-
the maximum number of individuals a habitat can support
-
birth rate x death rate
-
mass gained by individuals per unit time
Frage 7
Frage
A hurricane wipes out most of a population of palm trees. This type to limiter of population growth is:
Antworten
-
density-dependent
-
density-independent
-
negative exponential
-
logistic
Frage 8
Antworten
-
linear
-
logistic
-
exponential
-
parabolic
Frage 9
Frage
Exponential population growth is density-independent.
Antworten
- True
- False
Frage 10
Frage
In what type of species would r(max) be highest?
Antworten
-
young age-at-maturity, few offspring
-
young age-at-maturity, many offspring
-
old age-at-maturity, many offspring
-
old age-at-maturity, few offspring
Frage 11
Antworten
-
predation by lynx
-
food availability
-
space
-
both a and b
-
none of the above
Frage 12
Frage
Which of the following statements about metapopulations is FALSE?
Antworten
-
a metapopulation is a population of populations
-
populations that have gone extinct can be restored
-
overall population size (summing all patches) is constant
-
there are 'core' populations that never go extinct
Frage 13
Frage
In a metapopulation, there is a balance between extinction and (re)colonization.
Antworten
- True
- False
Frage 14
Frage
Many of the hypotheses that have been developed to explain population cycles (including in hares) involve:
Antworten
-
density-dependent factors
-
density-independent factors
-
carrying capacity
-
age-specific factors
Frage 15
Frage
Projections for human population growth depend primarily on what factor?
Antworten
-
infant mortality rates
-
overall survivorship
-
fertility rates in women
-
disease eradication
Frage 16
Frage
Which of the following is TRUE about the current status of the human population?
Antworten
-
the population is increasing, but r is decreasing
-
the population is increasing; r=0.5
-
the population is increasing, and r is increasing
-
the population is stable; r (population growth rate) = 0
Frage 17
Frage
You are a human demographer, and you see an age pyramid that looks like the figure below. What would you say about this population?
Image:
pop_pyramid (image/jpg)
Antworten
-
the population is growing rapidly
-
none of the above
-
the population is dominated by people past reproductive age
-
the population has reached carrying capacity
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