Question 1

Which factor may result in the actual carrying capacity of our planet being lower than initially calculated?

Accepted Answer

A)   The average American uses more resources than someone from another country.
B)   Modern food production relies on nonrenewable resources.
C)   NPP has been decreasing.
D)   The human population is growing much faster than was previously thought.E) All of the above
F) B) and D)

Question 2

What group is represented by all of the bacteria species E. coli living inside a cow's intestine?

Accepted Answer

A)   community
B)   population
C)   ecosystem
D)   demographic transitionE) A) and B)
F) All of the above

Question 3

What is the steep and sudden decline in a population size as birth rates plummet and death rates soar?

Accepted Answer

A)   carrying capacity
B)   a "boom and bust" cycle
C)   demographic momentum
D)   a population crashE) A) and D)
F) B) and D)

Question 4

True or false: The carrying capacity of a given geographic region for a single population can change over time.

Accepted Answer

A) True 
 B)False

Question 5

What type of distribution would include the evenly spaced distribution of stalks of corn planted in an agricultural field?

Accepted Answer

A)   a clumped distribution
B)   a uniform distribution
C)   a random distribution
D)   no distributionE) C) and D)
F) B) and D)

Question 6

Red maple tree seeds are dispersed by the wind. This species of tree can be found in fields, woods, and even wetlands. What type of distribution applies to this example?

Accepted Answer

A)   clumped
B)   uniform
C)   random
D)   normalE) None of the above
F) A) and C)

Question 7

Which factor has dramatically decreased infant mortality in human populations?

Accepted Answer

A)   a shift from an agricultural to an industrial economy
B)   the use of pesticides to reduce mosquito populations
C)   the choice made by educated women to have fewer children
D)   an increase in poverty in developed countriesE) A) and D)
F) B) and D)

Question 8

What is the birth rate in a population in which 35 babies are born per every 1000 people in the population each year?

Accepted Answer

A)   0.35
B)   35%
C)   3.5%
D)   0.35%E) B) and D)
F) C) and D)

Question 9

Which population was unaffected by density-dependent factors?

Accepted Answer

A)   elk in Yellowstone National Park in the 1970s
B)   Norway lemmings
C)   yeast that ferment grape juice into wine
D)   bacteria kept in a culture that has its nutrients constantly replenishedE) None of the above
F) A) and B)

Question 10

What characteristics apply to developed countries?

Accepted Answer

A)   industrial economies and low individual incomes
B)   agricultural economies and high individual incomes
C)   agricultural economies and low individual incomes
D)   industrial economies and high individual incomesE) All of the above
F) None of the above

Question 11

True or false: Scientists agree on the size of the carrying capacity of Earth for the human population.

Accepted Answer

A) True 
 B)False

Question 12

Which experiment would not be considered an ecological study?

Accepted Answer

A)   the effect of a housing development on a spotted salamander population in a vernal pool
B)   the effect of changing availability of acorns on a population of squirrels
C)   the effect of a red tide outbreak on sea birds in the area
D)   the effect of a hormone on the rate of blood vessel formationE) C) and D)
F) B) and D)

Question 13

What would happen if everyone on the planet used resources and lived the average lifestyle of an American?

Accepted Answer

A)   The Earth would have the carrying capacity to sustain the human population.
B)   The population growth rate would immediately decrease.
C)   We would need multiple Earths for this to be possible.
D)   There would be same number of people in less-developed countries as there are Americans.E) B) and C)
F) B) and D)

Question 14

Which description applies to a population that's exhibiting exponential growth?

Accepted Answer

A)   It will have growth proportional to the current total.
B)   It shows a decreased growth rate over time.
C)   It doubles every year.
D)   It has as many individuals being born as are dying.E) None of the above
F) A) and D)

Question 15

Which factor is a population-limiting, density-dependent factor?

Accepted Answer

A)   a heavy flood that destroys a large area around a river
B)   a heat wave in which some organisms can't survive
C)   a drought that limits food availability
D)   the rapid spread of tuberculosis in heavily populated areasE) None of the above
F) A) and D)

Question 16

Which situation would result in a population represented by an inverted triangular population pyramid, which is heaviest at the top?

Accepted Answer

A)   rapid population growth
B)   population stabilization
C)   a "boom and bust" cycle
D)   a population declineE) A) and B)
F) A) and C)

Question 17

Why may human populations surpass the carrying capacity of their environment?

Accepted Answer

A)   temporary reliance on stored or nonrenewable resources
B)   sudden population crashes
C)   increases in death rates as the population growth approaches carrying capacity
D)   decreases in birth rates as resources are depletedE) A) and C)
F) A) and B)

Question 18

Which assumption applies to the mark-recapture method?

Accepted Answer

A)   Marked individuals become "trap-happy" relative to unmarked individuals.
B)   Marked individuals avoid recapture, relative to unmarked individuals.
C)   Few individuals enter or leave the study area during the period between mark and recapture.
D)   The population size changes dramatically between the time of mark and recapture.E) B) and C)
F) All of the above

Question 19

By how many people does the global human population increase each day?

Accepted Answer

A)   1000
B)   12,500
C)   250,000
D)   2,500,000E) None of the above
F) B) and C)

Question 20

What does a completely columnar population pyramid represent?

Accepted Answer

A)   proportionally more young than middle-aged or elderly people
B)   equal proportions of young, middle-aged, and elderly people
C)   proportionally more middle-aged and elderly than young people
D)   proportionally more middle-aged than elderly and/or young peopleE) A) and C)
F) All of the above

Exam 14: Is the Human Population Too Large Population Ecology

What group is represented by all of the bacteria species E. coli living inside a cow's intestine?

Correct AnswerverifiedShow Answer

Which description applies to a population that's exhibiting exponential growth?

Correct AnswerverifiedShow Answer

What characteristics apply to developed countries?

Correct AnswerverifiedShow Answer

Which factor is a population-limiting, density-dependent factor?

Correct AnswerverifiedShow Answer

Which assumption applies to the mark-recapture method?

Correct AnswerverifiedShow Answer

Which factor has dramatically decreased infant mortality in human populations?

Correct AnswerverifiedShow Answer

True or false: The carrying capacity of a given geographic region for a single population can change over time.

Correct AnswerverifiedShow Answer

Why may human populations surpass the carrying capacity of their environment?

Correct AnswerverifiedShow Answer

What is the birth rate in a population in which 35 babies are born per every 1000 people in the population each year?

Correct AnswerverifiedShow Answer

Which situation would result in a population represented by an inverted triangular population pyramid, which is heaviest at the top?

Correct AnswerverifiedShow Answer

True or false: Scientists agree on the size of the carrying capacity of Earth for the human population.

Correct AnswerverifiedShow Answer

By how many people does the global human population increase each day?

Correct AnswerverifiedShow Answer

Red maple tree seeds are dispersed by the wind. This species of tree can be found in fields, woods, and even wetlands. What type of distribution applies to this example?

Correct AnswerverifiedShow Answer

What type of distribution would include the evenly spaced distribution of stalks of corn planted in an agricultural field?

Correct AnswerverifiedShow Answer

What does a completely columnar population pyramid represent?

Correct AnswerverifiedShow Answer

Which population was unaffected by density-dependent factors?

Correct AnswerverifiedShow Answer

Which experiment would not be considered an ecological study?

Correct AnswerverifiedShow Answer

What is the steep and sudden decline in a population size as birth rates plummet and death rates soar?

Correct AnswerverifiedShow Answer

Which factor may result in the actual carrying capacity of our planet being lower than initially calculated?

Correct AnswerverifiedShow Answer

What would happen if everyone on the planet used resources and lived the average lifestyle of an American?

Correct AnswerverifiedShow Answer

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