Question 1

The type of location where a species lives is its ________.

Accepted Answer

The answer of The type of location where a species...

Question 2

Which one of the following is TRUE regarding an ecological pyramid?

Accepted Answer

A)   An ecological pyramid can depict either the total amount of energy stored at each level of an ecosystem or the total biomass at each level.
B)   The population of producers depends largely on the populations of consumers below it.
C)   The amount of energy represented by tertiary consumers is greater than the amount of energy represented by primary consumers.
D)   Animals such as wolves and eagles would be located at the base of the pyramid.
E)   The amount of energy represented by producers is equivalent to the amount of energy represented by the secondary consumers.F) A) and D)
G) A) and E)

Question 3

A species moving into a new habitat will be able to adapt only if there is genetic change in the population.

Accepted Answer

A) True 
 B)False

Question 4

Herbivores may also be referred to as

Accepted Answer

A)   producers.
B)   quaternary consumers.
C)   primary consumers.
D)   carbohydrate consumers.
E)   autotrophs.F) B) and D)
G) C) and D)

Question 5

Regular, consistent intervention, such as some modern logging practices, may create which type of stable community?

Accepted Answer

A)   immature
B)   evergreen
C)   forest
D)   recovered
E)   variedF) B) and E)
G) B) and D)

Question 6

Under natural conditions, the amount of nitrogen gas returned to the atmosphere by denitrification approximately equals

Accepted Answer

A)   phosphorus cycling.
B)   evaporation.
C)   nitrogen fixation.
D)   sublimation.
E)   photosynthesis.F) A) and B)
G) A) and C)

Question 7

Trees undergoing photosynthesis in a mature forest can best be described as

Accepted Answer

A)   primary consumers.
B)   secondary consumers.
C)   chemoautotrophs.
D)   primary producers.
E)   heterotrophs.F) A) and E)
G) C) and E) D

Question 8

Which statement describes the expected population growth in the next 50 years?

Accepted Answer

A)   The population growth will be relatively equal throughout the world.
B)   The greatest population growth is likely to occur in the more industrialized countries, including the United States and Europe.
C)   Most countries worldwide will achieve zero population growth in the next 10 years.
D)   The greatest population growth is likely to occur in the least industrialized countries.
E)   There will be a net decline of population, with the United States and other industrialized countries contributing most to the population decline.F) C) and E)
G) B) and C)

Question 9

The introduction of invasive species may increase the environmental resistance for a native species.

Accepted Answer

A) True 
 B)False

Question 10

Match each term to its definition.
-area in which the species is distributed

Accepted Answer

A)  habitat
B)  ecosystem
C)  geographic range
D)  niche
E)  communityF) D) and E)
G) B) and D)

Question 11

Match the following.
-a plant producing high-energy carbohydrates from carbon dioxide and water, using energy from the sun

Accepted Answer

A)  herbivore
B)  decomposer, carnivore
C)  omnivore
D)  producerE) A) and B)
F) All of the above

Question 12

Match the following.
-a blow fly feeding on a corpse

Accepted Answer

A)  herbivore
B)  decomposer, carnivore
C)  omnivore
D)  producerE) A) and D)
F) C) and D) B

Question 13

During photosynthesis, high-energy carbohydrates are produced at the end of

Accepted Answer

A)   light absorption by chlorophyll.
B)   cellular respiration.
C)   the light reactions.
D)   the Calvin cycle.
E)   the electron transport pathway.F) A) and B)
G) A) and C)

Question 14

A species' biotic potential is intrinsically determined by all of the following EXCEPT which one?

Accepted Answer

A)   the number of members of reproductive age
B)   the number of offspring produced by each reproducing member
C)   the time span before offspring reach reproductive maturity
D)   the ratio of males to females
E)   the presence of competing species in the same habitatF) None of the above
G) C) and D)

Question 15

The figure above shows an ecological pyramid. Which level of this pyramid contains the primary producers?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   C and DF) C) and D)
G) B) and C)

Question 16

Mature communities generally exhibit the greatest species diversity.

Accepted Answer

A) True 
 B)False  True

Question 17

If the population age structure of a country resembles a pyramid, with the pre-reproductive age group the largest proportion of the population, and the post-reproductive age group the smallest, this country can most likely be classified as one of the

Accepted Answer

A)   stable populations.
B)   least developed countries.
C)   most developed countries.
D)   steady-state populations.
E)   expanding populations.F) All of the above
G) A) and B)

Question 18

Match the following.
-a cow feeding on grass in a field

Accepted Answer

A)  herbivore
B)  decomposer, carnivore
C)  omnivore
D)  producerE) All of the above
F) A) and D)

Question 19

The process of converting nitrogen gas to ammonium is called

Accepted Answer

A)   biogeochemical processing.
B)   sublimation.
C)   nitrogen fixation.
D)   evaporation.
E)   nitrification.F) B) and D)
G) A) and E)

Question 20

The number of offspring produced by each reproducing member of a species, the ratio of males to females, and the time it takes offspring to become reproductively mature are determinants of the ________ of a population.

Accepted Answer

The answer of The number of offspring produced by each...

Exam 23: Ecosystems and Populations

The type of location where a species lives is its ________.

Correct AnswerverifiedShow Answer

Which one of the following is TRUE regarding an ecological pyramid?

Correct AnswerverifiedShow Answer

A species moving into a new habitat will be able to adapt only if there is genetic change in the population.

Correct AnswerverifiedShow Answer

Herbivores may also be referred to as

Correct AnswerverifiedShow Answer

Regular, consistent intervention, such as some modern logging practices, may create which type of stable community?

Correct AnswerverifiedShow Answer

Under natural conditions, the amount of nitrogen gas returned to the atmosphere by denitrification approximately equals

Correct AnswerverifiedShow Answer

Trees undergoing photosynthesis in a mature forest can best be described as

Correct AnswerverifiedD

Which statement describes the expected population growth in the next 50 years?

Correct AnswerverifiedShow Answer

The introduction of invasive species may increase the environmental resistance for a native species.

Correct AnswerverifiedShow Answer

Match each term to its definition. -area in which the species is distributed

Correct AnswerverifiedShow Answer

Match the following. -a plant producing high-energy carbohydrates from carbon dioxide and water, using energy from the sun

Correct AnswerverifiedShow Answer

Match the following. -a blow fly feeding on a corpse

Correct AnswerverifiedB

During photosynthesis, high-energy carbohydrates are produced at the end of

Correct AnswerverifiedShow Answer

A species' biotic potential is intrinsically determined by all of the following EXCEPT which one?

Correct AnswerverifiedShow Answer

The figure above shows an ecological pyramid. Which level of this pyramid contains the primary producers?

Correct AnswerverifiedShow Answer

Mature communities generally exhibit the greatest species diversity.

Correct AnswerverifiedTrue

If the population age structure of a country resembles a pyramid, with the pre-reproductive age group the largest proportion of the population, and the post-reproductive age group the smallest, this country can most likely be classified as one of the

Correct AnswerverifiedShow Answer

Match the following. -a cow feeding on grass in a field

Correct AnswerverifiedShow Answer

The process of converting nitrogen gas to ammonium is called

Correct AnswerverifiedShow Answer

The number of offspring produced by each reproducing member of a species, the ratio of males to females, and the time it takes offspring to become reproductively mature are determinants of the ________ of a population.

Correct AnswerverifiedShow Answer

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D

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B

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True

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