Question 1

Natality is usually

Accepted Answer

A)   Constant in a population
B)   Constant for a species
C)   Constant in an ecosystem
D)   Variable, depending on the number of recent deaths
E)   Variable, depending on environmental conditionsF) A) and C)
G) All of the above

Question 2

In the real world, many factors determine the numbers of organisms in any one population. Yet, a "superfly" with unlimited food and no mortality would show what type of growth?

Accepted Answer

A)   Geometric increase
B)   Irruptive growth
C)   Exponential growth
D)   Logistic growth
E)   Malthusian growthF) B) and C)
G) D) and E)

Question 3

An island has formed off the coast of the Pacific Northwest. The Department of Natural Resources (DNR)  has determined that there is enough land area for a herd of 100 elk, yet they say the carrying capacity is only 60 elk. This inequality can best be explained by the fact that the

Accepted Answer

A)   DNR is probably being careful not to overestimate
B)   DNR must have added up the environmental resistance incorrectly
C)   Elk population will probably fluctuate between 60 and 100 animals
D)   Physical factor of space is only one of the determiners for population size in a community
E)   Law of limiting factors determines the maximum growth rate for a given populationF) A) and E)
G) B) and C) D

Question 4

The ability to produce rapid population overshoots can be a useful strategy for a species that tends to

Accepted Answer

A)   Colonize new territory
B)   Maintain a firm position in its current habitat
C)   Be part of a climax community
D)   Develop intricate niche relationships
E)   Be part of a complex ecosystemF) D) and E)
G) None of the above

Question 5

The highest number of game or commercial species that can be harvested in a single season without limiting growth for future seasons is the maximal sustainable yield.

Accepted Answer

A) True 
 B)False

Question 6

In the context of population growth regulation, intrinsic factors are those that

Accepted Answer

A)   operate within or between organisms.
B)   lower reproductive success by a variety of means.
C)   are imposed on the population from outside.
D)   increase reproductive success by a variety of means.E) A) and D)
F) All of the above

Question 7

Widespread starvation is an example of _________ population control.

Accepted Answer

A)   Predator-caused
B)   Biotic
C)   Density-dependent
D)   Density-independent
E)   AbioticF) A) and B)
G) A) and C)

Question 8

Many species exhibit both exponential (__________)  and logistic (_________)  population growth characteristics.

Accepted Answer

A)   r selected; K selected
B)   K selected; r selectedC) A) and B)
D) undefined

Question 9

White-tailed deer populations are at about the same levels as they were a century ago.

Accepted Answer

A) True 
 B)False

Question 10

Carrying capacity is the population or biomass

Accepted Answer

A)   That an environment can support in an optimal year
B)   Of a species that an environment can support on a long-term basis
C)   That remains after a catastrophic dieback has occurred
D)   Of a species without limiting factors
E)   Of a species without predatorsF) B) and D)
G) A) and E)

Question 11

If there is no migration, the size of a population is limited solely by interaction between

Accepted Answer

A)   Natality and fertility
B)   Mortality and fecundity
C)   Mortality and survivorship
D)   Natality and mortality
E)   Life expectancy and survivorshipF) A) and B)
G) A) and C)

Question 12

Density-independent factors tend to be

Accepted Answer

A)   more associated with abiotic factors.
B)   more associated with intrinsic factors.
C)   unable to lower reproductive gains in a population.
D)   more influential with natality rates than mortality rates.E) All of the above
F) A) and D)

Question 13

How does island biogeography apply to ecosystems other than islands?

Accepted Answer

A)   Relatively rare ecosystems such as coastal areas are more stable if they have high species diversity
B)   Habitats that are large and close to development are more adversely affected than smaller fragmented habitats
C)   Habitat fragmentation has formed islands of habitat in "oceans" of development
D)   Along with islands in oceans and lakes, the principles of island biogeography apply only to wetland areas
E)   Island biogeography is only concerned with islands in oceans and lakesF) A) and B)
G) B) and D)

Question 14

The most common factor that affects birth and death rates within a population independently of density is

Accepted Answer

A)   Fire
B)   Competition
C)   Weather
D)   Stress
E)   None of these is correctF) A) and C)
G) All of the above C

Question 15

A collection of separate populations that interact with each other is called a metapopulation.

Accepted Answer

A) True 
 B)False

Question 16

A dieback or population crash, often occurs after a species ________ its environmental carrying capacity.

Accepted Answer

A)   Meets
B)   Undershoots
C)   Overshoots
D)   Oscillates around
E)   DecreasesF) C) and D)
G) B) and C)

Question 17

Conservation biologists refer to the number of individuals needed for long-term survival as

Accepted Answer

A)   the bottleneck.
B)   the carrying capacity.
C)   the minimum viable population size.
D)   K selected.E) A) and D)
F) A) and C)

Question 18

Density-independent population control factors cause mortality

Accepted Answer

A)   When the population becomes too large
B)   When the density becomes too high
C)   When the population becomes too small
D)   When the density becomes too low
E)   Regardless of population sizeF) B) and E)
G) C) and D)

Question 19

Exponential growth in a population

Accepted Answer

A)   refers to an increase by a constant amount, such as a net gain of 100 individuals per year.
B)   refers to an increase by a constant percentage each year.
C)   is also called arithmetic growth.
D)   includes any pattern of increase in numbers.E) B) and D)
F) B) and C) B

Question 20

An organism with ___________ "strategies" would be considered to have __________ natality. rev: 06_07_2016_QC_CS-55049

Accepted Answer

A)   K-adapted; high
B)   R-adapted; high
C)   K-adapted; low
D)   R-adapted; low
E)   R-adapted; high AND K-adaptedF) C) and E)
G) B) and E)

Exam 6: Population Biology

Natality is usually

Correct AnswerverifiedShow Answer

In the real world, many factors determine the numbers of organisms in any one population. Yet, a "superfly" with unlimited food and no mortality would show what type of growth?

Correct AnswerverifiedShow Answer

An island has formed off the coast of the Pacific Northwest. The Department of Natural Resources (DNR) has determined that there is enough land area for a herd of 100 elk, yet they say the carrying capacity is only 60 elk. This inequality can best be explained by the fact that the

Correct AnswerverifiedD

The ability to produce rapid population overshoots can be a useful strategy for a species that tends to

Correct AnswerverifiedShow Answer

The highest number of game or commercial species that can be harvested in a single season without limiting growth for future seasons is the maximal sustainable yield.

Correct AnswerverifiedShow Answer

In the context of population growth regulation, intrinsic factors are those that

Correct AnswerverifiedShow Answer

Widespread starvation is an example of _________ population control.

Correct AnswerverifiedShow Answer

Many species exhibit both exponential (__________) and logistic (_________) population growth characteristics.

Correct AnswerverifiedShow Answer

White-tailed deer populations are at about the same levels as they were a century ago.

Correct AnswerverifiedShow Answer

Carrying capacity is the population or biomass

Correct AnswerverifiedShow Answer

If there is no migration, the size of a population is limited solely by interaction between

Correct AnswerverifiedShow Answer

Density-independent factors tend to be

Correct AnswerverifiedShow Answer

How does island biogeography apply to ecosystems other than islands?

Correct AnswerverifiedShow Answer

The most common factor that affects birth and death rates within a population independently of density is

Correct AnswerverifiedC

A collection of separate populations that interact with each other is called a metapopulation.

Correct AnswerverifiedShow Answer

A dieback or population crash, often occurs after a species ________ its environmental carrying capacity.

Correct AnswerverifiedShow Answer

Conservation biologists refer to the number of individuals needed for long-term survival as

Correct AnswerverifiedShow Answer

Density-independent population control factors cause mortality

Correct AnswerverifiedShow Answer

Exponential growth in a population

Correct AnswerverifiedB

An organism with ___________ "strategies" would be considered to have __________ natality. rev: 06_07_2016_QC_CS-55049

Correct AnswerverifiedShow Answer

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D

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Many species exhibit both exponential (__) and logistic (_) population growth characteristics.

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C

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B

An organism with _ "strategies" would be considered to have natality. rev: 06_07_2016_QC_CS-55049

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