Question 1

At the basic level an ecologist will study how an organism is adapted to its environment.

Accepted Answer

A) True 
 B)False

Question 2

A form of symbiosis in which both participants benefit is

Accepted Answer

A)  commensalism.
B)  parasitism.
C)  mutualism.
D)  predation.
E)  competition.

Question 3

The idea that plants cannot grow on a particular area until the soil has been developed enough by an earlier community is the

Accepted Answer

A)  climax-pattern model.
B)  facilitation model.
C)  inhibition model.
D)  tolerance model.
E)  soil development model.

Question 4

Which of the following statements accurately describes the less developed countries?

Accepted Answer

A)  high birthrate,large pre-reproductive portion of the population
B)  high birthrate,different age groups of equal size
C)  high growth rate,reproductive portion of the population is the largest
D)  low growth rate,different age groups of equal size
E)  high growth rate,different age groups of equal size

Question 5

Parasites are found

Accepted Answer

A)  only as viruses,bacteria,and protists.
B)  only as viruses,bacteria,protists,and animals; no plants are parasites because they cannot move.
C)  only on host animals.
D)  only on one host where they can complete their life cycle and disperse to others of that same species.
E)  in all kingdoms,and sometimes one parasite uses more than one host to disperse.

Question 6

A population with rapidly expanding exponential growth would be best represented by a graph with a(n) ______-shaped curve.

Accepted Answer

A)  bell
B)  urn
C)  pyramid
D)  S
E)  J

Question 7

All the members of the same species that inhabit a particular area are termed a(n)

Accepted Answer

A)  ecosystem.
B)  biosphere.
C)  ecological niche.
D)  population.
E)  community.

Question 8

The harmless orange-and-black viceroy butterfly closely resembling the toxic orange-and-black monarch butterfly is an example of

Accepted Answer

A)  Müllerian mimicry.
B)  Batesian mimicry.
C)  both Müllerian and Batesian mimicry.
D)  a case of resource partitioning.
E)  a case of competitive exclusion.

Question 9

Primary succession takes much longer than secondary succession because it involves

Accepted Answer

A)  colonization by more equilibrium species.
B)  time for weathering of rock and development of the soil horizons.
C)  more time for development of a seed bank.
D)  colonization by organisms that are farther away.
E)  redevelopment of the atmospheric gases.

Question 10

Which of the following describes a type I survivorship curve (drawn by plotting the number of individuals in a given population alive at the beginning of each age interval) ?

Accepted Answer

A)  Most individuals die of old age.
B)  Many individuals die early in life.
C)  Individuals die at a constant rate throughout time.
D)  Most individuals die during their reproductive years.
E)  Most individuals die before old age,but after their reproductive years.

Question 11

Population size is believed to level off at the _______ of an environment.

Accepted Answer

A)  population growth
B)  biotic potential
C)  environmental resistance
D)  carrying capacity
E)  doubling time

Question 12

The relatively thin layer on the earth's surface where life is possible is known as the

Accepted Answer

A)  ecosystem.
B)  biosphere.
C)  biome.
D)  biopreserve.
E)  lithosphere.

Question 13

The human growth curve is best described as being

Accepted Answer

A)  flat.
B)  J-shaped.
C)  V-shaped.
D)  S-shaped.
E)  W-shaped.

Question 14

A population of 100 butterflies living on an acre of land loses three-quarters of its members when a sudden freeze in the spring occurs just after they emerge as caterpillars.This population has undergone a reduction in population size due to

Accepted Answer

A)  an intrinsic factor.
B)  a density-independent factor.
C)  a density-dependent factor.
D)  natural selection.
E)  an opportunistic control.

Question 15

Which of the following is NOT a form of environmental resistance?

Accepted Answer

A)  limited food supply
B)  accumulation of waste products
C)  number of offspring produced per litter
D)  predation
E)  limited living space

Question 16

Which is NOT a density-dependent factor?

Accepted Answer

A)  food supply
B)  weather
C)  shelter or nest space
D)  disease
E)  predators

Question 17

During mutualism,one species benefits while the other is harmed.

Accepted Answer

A) True 
 B)False

Question 18

If a population has many more young women entering the reproductive years than older women leaving the reproductive years,which of the following statements is NOT true?

Accepted Answer

A)  The growth rate will most likely increase.
B)  The replacement reproduction will give a positive growth rate.
C)  It is likely to be a MDC.
D)  It is likely to be a LDC.
E)  The population will continue to grow as more young women enter the reproductive phase.

Question 19

Farmers sprayed leechi trees to suppress populations of scale insects.This also killed the populations of a predatory lacewing that controlled the numbers of scales.Soon the spraying did no good,and the damage to the leechi from the scales was greater than before spraying had occurred.Few predatory lacewings existed in the trees now because

Accepted Answer

A)  they,too,are insects so they are opportunistic species.
B)  both insects were equilibrium species and resistance was a matter of chance.
C)  the predator was an opportunistic species and was therefore more susceptible to the spray.
D)  the scale insect was an opportunistic species and the high number of young included a resistant strain; the predator was an equilibrium species and will take longer to produce a resistant variety.
E)  they had reached their carrying capacity and thus their numbers decreased due to environmental resistance.

Question 20

All of the organisms living in your front yard represent a(n) _______,while the blue jays represent a(n) ______.

Accepted Answer

A)  population; community
B)  population; ecosystem
C)  ecosystem; population
D)  community; population
E)  ecosystem; community

Exam 34: Population Ecology

Primary succession takes much longer than secondary succession because it involves

Correct Answer
verified

A population with rapidly expanding exponential growth would be best represented by a graph with a(n) ______-shaped curve.

Correct Answer
verified

At the basic level an ecologist will study how an organism is adapted to its environment.

Correct Answer
verified

Parasites are found

Correct Answer
verified

Which of the following describes a type I survivorship curve (drawn by plotting the number of individuals in a given population alive at the beginning of each age interval) ?

Correct Answer
verified

The harmless orange-and-black viceroy butterfly closely resembling the toxic orange-and-black monarch butterfly is an example of

Correct Answer
verified

Which of the following is NOT a form of environmental resistance?

Correct Answer
verified

Which of the following statements accurately describes the less developed countries?

Correct Answer
verified

Population size is believed to level off at the _______ of an environment.

Correct Answer
verified

A population of 100 butterflies living on an acre of land loses three-quarters of its members when a sudden freeze in the spring occurs just after they emerge as caterpillars.This population has undergone a reduction in population size due to

Correct Answer
verified

The human growth curve is best described as being

Correct Answer
verified

The relatively thin layer on the earth's surface where life is possible is known as the

Correct Answer
verified

Correct Answer
verified

All of the organisms living in your front yard represent a(n) _,while the blue jays represent a(n) .

Correct Answer
verified

All the members of the same species that inhabit a particular area are termed a(n)

Correct Answer
verified

The idea that plants cannot grow on a particular area until the soil has been developed enough by an earlier community is the

Correct Answer
verified

During mutualism,one species benefits while the other is harmed.

Correct Answer
verified

A form of symbiosis in which both participants benefit is

Correct Answer
verified

If a population has many more young women entering the reproductive years than older women leaving the reproductive years,which of the following statements is NOT true?

Correct Answer
verified

Which is NOT a density-dependent factor?

Correct Answer
verified

Exam 34: Population Ecology

Primary succession takes much longer than secondary succession because it involves

Correct AnswerverifiedShow Answer

A population with rapidly expanding exponential growth would be best represented by a graph with a(n) ______-shaped curve.

Correct AnswerverifiedShow Answer

At the basic level an ecologist will study how an organism is adapted to its environment.

Correct AnswerverifiedShow Answer

Parasites are found

Correct AnswerverifiedShow Answer

Which of the following describes a type I survivorship curve (drawn by plotting the number of individuals in a given population alive at the beginning of each age interval) ?

Correct AnswerverifiedShow Answer

The harmless orange-and-black viceroy butterfly closely resembling the toxic orange-and-black monarch butterfly is an example of

Correct AnswerverifiedShow Answer

Which of the following is NOT a form of environmental resistance?

Correct AnswerverifiedShow Answer

Which of the following statements accurately describes the less developed countries?

Correct AnswerverifiedShow Answer

Population size is believed to level off at the _______ of an environment.

Correct AnswerverifiedShow Answer

A population of 100 butterflies living on an acre of land loses three-quarters of its members when a sudden freeze in the spring occurs just after they emerge as caterpillars.This population has undergone a reduction in population size due to

Correct AnswerverifiedShow Answer

The human growth curve is best described as being

Correct AnswerverifiedShow Answer

The relatively thin layer on the earth's surface where life is possible is known as the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

All of the organisms living in your front yard represent a(n) _______,while the blue jays represent a(n) ______.

Correct AnswerverifiedShow Answer

All the members of the same species that inhabit a particular area are termed a(n)

Correct AnswerverifiedShow Answer

The idea that plants cannot grow on a particular area until the soil has been developed enough by an earlier community is the

Correct AnswerverifiedShow Answer

During mutualism,one species benefits while the other is harmed.

Correct AnswerverifiedShow Answer

A form of symbiosis in which both participants benefit is

Correct AnswerverifiedShow Answer

If a population has many more young women entering the reproductive years than older women leaving the reproductive years,which of the following statements is NOT true?

Correct AnswerverifiedShow Answer

Which is NOT a density-dependent factor?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

All of the organisms living in your front yard represent a(n) _,while the blue jays represent a(n) .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified