Question 1

Which of the following is NOT true?

Accepted Answer

A)   Many MDCs have a stabilized age structure diagram.
B)   Most LDCs have a youthful age structure diagram.
C)   The quicker the replacement reproduction is achieved, the sooner the zero population growth results.
D)   The human population growth curve is exponential.
E)   As the human population increases in size, less energy but more material will be consumed.F) A) and E)
G) B) and C) E

Question 2

List the features used to identify a species as an Opportunistic species (r-strategist).

Accepted Answer

small individuals
short life s...

Question 3

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 sizeF) B) and D)
G) C) and D)

Question 4

The demographic transition,where population growth slows in developed countries,may be attributed at least in part to

Accepted Answer

A)   socialization.
B)   sensitivity.
C)   urbanization.
D)   the rise of medicine.
E)   education.F) A) and D)
G) B) and D)

Question 5

A population age structure in which the birthrate is high and the population is mainly young would be best represented by a graph with a(n)

Accepted Answer

A)   bell shape.
B)   urn shape.
C)   pyramid shape.
D)   S-shaped curve.
E)   J-shaped curve.F) A) and E)
G) A) and B)

Question 6

Which is NOT a density-dependent factor?

Accepted Answer

A)   food supply
B)   weather
C)   shelter or nest space
D)   disease
E)   predatorsF) A) and D)
G) B) and D)

Question 7

The maximum population that the environment can support for an indefinite period of time is called the

Accepted Answer

A)   biotic potential.
B)   environmental resistance.
C)   carrying capacity.
D)   replacement reproduction.
E)   demographic transition.F) D) and E)
G) A) and E)

Question 8

The carrying capacity of the environment for a species is determined by

Accepted Answer

A)   the reproductive rate of the organism.
B)   the number of organisms of that species.
C)   the state and national wildlife laws pertaining to that species.
D)   a complex "balance of nature" that still has not been explained in terms that scientists can calculate.
E)   the limited productivity of the environment and the environmental resistance to the biotic potential of the organism.F) C) and E)
G) A) and E)

Question 9

Biotic potential depends on all of the following EXCEPT

Accepted Answer

A)   the usual number of offspring per reproduction.
B)   how often each individual reproduces.
C)   how many different mates each individual has.
D)   chances of survival until the age of reproduction.
E)   the age at which reproduction begins.F) C) and D)
G) A) and D)

Question 10

A small marine amphipod has recently been discovered that carries another bad tasting organism on its back against its normal behavior.The "backpack" organism tastes bad.If a fish ingests the pair,it immediately spits them back out.If the amphipod is alone,however,the amphipod is readily eaten and swallowed.There is no apparent benefit in this relationship for the "backpack" organism which appears to be neither helped nor harmed.This is therefore a case of

Accepted Answer

A)   mutualism.
B)   parasitism.
C)   commensalism.
D)   competitive exclusion.
E)   predation.F) B) and D)
G) B) and C)

Question 11

Similar species occupying slightly different niches in the same community is shown by

Accepted Answer

A)   presence of carp in polluted waters in the United States.
B)   fluctuation of the snowshoe hare and lynx populations in Canada.
C)   competition between two species of barnacles in Scotland resulting in one living in the intertidal zone and the other living below this species.
D)   removal of a starfish species from intertidal communities in Washington.
E)   killing dingoes in Australia or coyotes in the American West.F) A) and E)
G) C) and D) C

Question 12

-Limiting factors of food and space will first be observed in Figure 34.03 at number

Accepted Answer

A)   1.
B)   2.
C)   3.
D)   4.
E)   5.F) B) and C)
G) A) and D)

Question 13

Explain the species interactions in each of the following symbiotic relationships: parasitism,commensalism and mutualism.

Accepted Answer

Parasitism: one species benefits while another is harmed.
Commensalism: one species benefits while there is no effect upon the other.
Mutualism: both species benefit from this relationship.

Question 14

When growth proceeds at a rate similar to 
2  →\rarr→ 4  →\rarr→  8  →\rarr→  16  →\rarr→  32  →\rarr→  64...etc.,it is called

Accepted Answer

A)   arithmetic growth.
B)   additive growth.
C)   exponential growth.
D)   zero population growth.
E)   carrying capacity. F) A) and C)
G) D) and E)

Question 15

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.F) A) and B)
G) A) and E)

Question 16

Interaction between two species in which one feeds on the other is

Accepted Answer

A)   competition.
B)   a community.
C)   an ecosystem.
D)   predation.
E)   symbiosis.F) All of the above
G) B) and E)

Question 17

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.F) B) and C)
G) None of the above

Question 18

Which statement is NOT true about parasitism?

Accepted Answer

A)   The host is generally larger than the parasite.
B)   Parasites are always severe and usually kill a host.
C)   Smaller parasites often live as endoparasites within the body of the host.
D)   Ectoparasites are attached to the outside of the host's body by specialized organs.
E)   Some organisms and all viruses are obligate parasites and must live inside a host.F) A) and B)
G) A) and E)

Question 19

Consider the life of the praying mantis.The large predatory female lays several hundred eggs in a foam mass in the fall.The young are most vulnerable when they emerge in the spring,but the few that survive spread out over the countryside and,if they find a mate,lay eggs the following fall.Which type of survivorship curve does this represent?

Accepted Answer

A)   type I
B)   type II
C)   type III
D)   exponential growth followed by a decline from resource depletion
E)   maximal exponential growth and minimal use of carrying capacityF) C) and E)
G) B) and D)

Question 20

A form of symbiosis in which both participants benefit is

Accepted Answer

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

Exam 34: Population and Community Ecology

Which of the following is NOT true?

Correct Answer
verified
E

List the features used to identify a species as an Opportunistic species (r-strategist).

Correct Answer
verified
small individuals
short life s...
View Answer

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

Correct Answer
verified

The demographic transition,where population growth slows in developed countries,may be attributed at least in part to

Correct Answer
verified

A population age structure in which the birthrate is high and the population is mainly young would be best represented by a graph with a(n)

Correct Answer
verified

Which is NOT a density-dependent factor?

Correct Answer
verified

The maximum population that the environment can support for an indefinite period of time is called the

Correct Answer
verified

The carrying capacity of the environment for a species is determined by

Correct Answer
verified

Biotic potential depends on all of the following EXCEPT

Correct Answer
verified

Correct Answer
verified

Similar species occupying slightly different niches in the same community is shown by

Correct Answer
verified
C

-Limiting factors of food and space will first be observed in Figure 34.03 at number

Correct Answer
verified

Explain the species interactions in each of the following symbiotic relationships: parasitism,commensalism and mutualism.

Correct Answer
verified
Parasitism: one species benefits while another is harmed. Commensalism: one species benefits while there is no effect upon the other. Mutualism: both species benefit from this relationship.

When growth proceeds at a rate similar to 2 $\rarr$ 4 $\rarr$ 8 $\rarr$ 16 $\rarr$ 32 $\rarr$ 64...etc.,it is called

Correct Answer
verified

Primary succession takes much longer than secondary succession because it involves

Correct Answer
verified

Interaction between two species in which one feeds on the other is

Correct Answer
verified

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

Correct Answer
verified

Which statement is NOT true about parasitism?

Correct Answer
verified

Correct Answer
verified

A form of symbiosis in which both participants benefit is

Correct Answer
verified

Exam 34: Population and Community Ecology

Which of the following is NOT true?

Correct AnswerverifiedE

List the features used to identify a species as an Opportunistic species (r-strategist).

Correct Answerverifiedsmall individualsshort life s...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

The demographic transition,where population growth slows in developed countries,may be attributed at least in part to

Correct AnswerverifiedShow Answer

A population age structure in which the birthrate is high and the population is mainly young would be best represented by a graph with a(n)

Correct AnswerverifiedShow Answer

Which is NOT a density-dependent factor?

Correct AnswerverifiedShow Answer

The maximum population that the environment can support for an indefinite period of time is called the

Correct AnswerverifiedShow Answer

The carrying capacity of the environment for a species is determined by

Correct AnswerverifiedShow Answer

Biotic potential depends on all of the following EXCEPT

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Similar species occupying slightly different niches in the same community is shown by

Correct AnswerverifiedC

-Limiting factors of food and space will first be observed in Figure 34.03 at number

Correct AnswerverifiedShow Answer

Explain the species interactions in each of the following symbiotic relationships: parasitism,commensalism and mutualism.

Correct AnswerverifiedParasitism: one species benefits while another is harmed. Commensalism: one species benefits while there is no effect upon the other. Mutualism: both species benefit from this relationship.

When growth proceeds at a rate similar to 2 →\rarr→ 4 →\rarr→ 8 →\rarr→ 16 →\rarr→ 32 →\rarr→ 64...etc.,it is called

Correct AnswerverifiedShow Answer

Primary succession takes much longer than secondary succession because it involves

Correct AnswerverifiedShow Answer

Interaction between two species in which one feeds on the other is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which statement is NOT true about parasitism?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A form of symbiosis in which both participants benefit is

Correct AnswerverifiedShow Answer

Correct Answer
verified
E

Correct Answer
verified
small individuals
short life s...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified
Parasitism: one species benefits while another is harmed. Commensalism: one species benefits while there is no effect upon the other. Mutualism: both species benefit from this relationship.

When growth proceeds at a rate similar to 2 $\rarr$ 4 $\rarr$ 8 $\rarr$ 16 $\rarr$ 32 $\rarr$ 64...etc.,it is called

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified