Question 1

Primary producers are represented by the letter ____.

Accepted Answer

The answer of   
 Primary producers are represented...

Question 2

Which of the following affects an ecosystem's nutrient reserves?

Accepted Answer

A)  rainfall 
B)  snowfall 
C)  weathering of rocks 
D)  rainfall and snowfall only 
E)  rainfall, snowfall, and weathering of rocks 
A)  rainfall 
B)  snowfall 
C)  weathering of rocks 
D)  rainfall and snowfall only 
E)  rainfall, snowfall, and weathering of rocks

Question 3

Which of the following is usually a primary carnivore?

Accepted Answer

A)  chicken 
B)  cow 
C)  rabbit 
D)  lion 
E)  squirrel 
A)  chicken 
B)  cow 
C)  rabbit 
D)  lion 
E)  squirrel

Question 4

What term denotes the range of all factors that influence whether a species can obtain resources essential for survival and reproduction?

Accepted Answer

A)  habitat 
B)  niche 
C)  carrying capacity 
D)  ecosystem 
E)  community 
A)  habitat 
B)  niche 
C)  carrying capacity 
D)  ecosystem 
E)  community

Question 5

Nitrate in the soil is represented by the letter ____.

Accepted Answer

The answer of   
 Nitrate in the soil...

Question 6

Herbivores represent the

Accepted Answer

A)  primary consumers. 
B)  secondary consumers. 
C)  tertiary consumers. 
D)  primary producers. 
E)  secondary producers. 
A)  primary consumers. 
B)  secondary consumers. 
C)  tertiary consumers. 
D)  primary producers. 
E)  secondary producers.

Question 7

Which of the following statements is false?

Accepted Answer

A)  Heat loss represents a one-way loss of energy from an ecosystem. 
B)  Organisms in the food chain are able to utilize all the energy contained in the food that they eat. 
C)  In some ecosystems, the majority of the energy stored in plants does not become available until the plants die. 
D)  Heat and energy are lost by each organism in the ecosystem. 
E)  The two food webs are classified as grazing and detrital. 
A)  Heat loss represents a one-way loss of energy from an ecosystem. 
B)  Organisms in the food chain are able to utilize all the energy contained in the food that they eat. 
C)  In some ecosystems, the majority of the energy stored in plants does not become available until the plants die. 
D)  Heat and energy are lost by each organism in the ecosystem. 
E)  The two food webs are classified as grazing and detrital.

Question 8

The primary consumer is also

Accepted Answer

A)  the second link in a food chain. 
B)  a herbivore. 
C)  an animal. 
D)  a herbivore and an animal. 
E)  the second link in a food chain as well as an herbivore and an animal. 
A)  the second link in a food chain. 
B)  a herbivore. 
C)  an animal. 
D)  a herbivore and an animal. 
E)  the second link in a food chain as well as an herbivore and an animal.

Question 9

Which of the following statements is FALSE?

Accepted Answer

A)  Ecologists use models to represent relationships between biogeochemical cycles and most ecosystems. 
B)  The physical environment has virtually no reservoir for most elements. 
C)  Inputs from the physical environment and recycling made possible by decomposers and detritivores maintain the nutrient reserves in an ecosystem. 
D)  In most major ecosystems, the amount of nutrients that is cycled within the ecosystem is greater than the amount entering or leaving the ecosystem in a given year. 
E)  Once elements are in the biological compartments of the biogeochemical cycles, they are unlikely to leave until the organism dies. 
A)  Ecologists use models to represent relationships between biogeochemical cycles and most ecosystems. 
B)  The physical environment has virtually no reservoir for most elements. 
C)  Inputs from the physical environment and recycling made possible by decomposers and detritivores maintain the nutrient reserves in an ecosystem. 
D)  In most major ecosystems, the amount of nutrients that is cycled within the ecosystem is greater than the amount entering or leaving the ecosystem in a given year. 
E)  Once elements are in the biological compartments of the biogeochemical cycles, they are unlikely to leave until the organism dies.

Question 10

Nitrogen gas in the atmosphere is represented by the letter ____.

Accepted Answer

The answer of   
 Nitrogen gas in the...

Question 11

Decomposers are

Accepted Answer

A)  primary consumers. 
B)  plants. 
C)  carnivores. 
D)  producers. 
E)  bacteria and fungi. 
A)  primary consumers. 
B)  plants. 
C)  carnivores. 
D)  producers. 
E)  bacteria and fungi.

Question 12

The movement of oxygen and hydrogen in the form of water takes place in which cycle?

Accepted Answer

A)  global water cycle 
B)  atmospheric cycles 
C)  sedimentary cycles 
D)  solar-plant cycle 
E)  all of these 
A)  global water cycle 
B)  atmospheric cycles 
C)  sedimentary cycles 
D)  solar-plant cycle 
E)  all of these

Question 13

Fertilizers are represented by the letter ____.

Accepted Answer

The answer of   
 Fertilizers are represented by...

Question 14

All living organisms are dependent upon plants because

Accepted Answer

A)  plants produce carbon dioxide as a by-product of photosynthesis. 
B)  as producers, they form the base of food chains. 
C)  they function to prevent erosion and reduce desertification. 
D)  they remove oxygen from the atmosphere. 
E)  they contribute to the problems generated by the greenhouse effect. 
A)  plants produce carbon dioxide as a by-product of photosynthesis. 
B)  as producers, they form the base of food chains. 
C)  they function to prevent erosion and reduce desertification. 
D)  they remove oxygen from the atmosphere. 
E)  they contribute to the problems generated by the greenhouse effect.

Question 15

Which of the following is NOT dependent on the others as a food source?

Accepted Answer

A)  carnivores 
B)  herbivores 
C)  producers 
D)  detritivores 
E)  decomposers 
A)  carnivores 
B)  herbivores 
C)  producers 
D)  detritivores 
E)  decomposers

Question 16

Which cannot be placed in a single trophic level?

Accepted Answer

A)  an oak tree 
B)  a zebra 
C)  a mushroom 
D)  a rabbit 
E)  a lion 
A)  an oak tree 
B)  a zebra 
C)  a mushroom 
D)  a rabbit 
E)  a lion

Question 17

Carbon is introduced into the atmosphere by all of the following means EXCEPT

Accepted Answer

A)  cellular respiration. 
B)  volcanic eruptions. 
C)  burning of fossil fuels. 
D)  wind erosion. 
E)  fire. 
A)  cellular respiration. 
B)  volcanic eruptions. 
C)  burning of fossil fuels. 
D)  wind erosion. 
E)  fire.

Question 18

Deserts, rain forests, hardwood forests, and tundra are all examples of

Accepted Answer

A)  habitats. 
B)  biomes. 
C)  ecosystems. 
D)  niches. 
E)  communities. 
A)  habitats. 
B)  biomes. 
C)  ecosystems. 
D)  niches. 
E)  communities.

Question 19

Selecting the Exception Four of the five answers listed below are related by a common action that retains nitrogen in the biomass. Select the exception.

Accepted Answer

A)  decomposition 
B)  ammonification 
C)  nitrification 
D)  nitrogen fixation 
E)  denitrification 
A)  decomposition 
B)  ammonification 
C)  nitrification 
D)  nitrogen fixation 
E)  denitrification

Question 20

Farmland that is under regular and continued tillage will not

Accepted Answer

A)  undergo succession. 
B)  produce a climax community. 
C)  experience competition. 
D)  suffer from the effects of disturbance. 
E)  develop species diversity. 
A)  undergo succession. 
B)  produce a climax community. 
C)  experience competition. 
D)  suffer from the effects of disturbance. 
E)  develop species diversity.

Exam 24: Principles of Ecology

Primary producers are represented by the letter ____.

Which of the following affects an ecosystem's nutrient reserves?

Which of the following is usually a primary carnivore?

What term denotes the range of all factors that influence whether a species can obtain resources essential for survival and reproduction?

Nitrate in the soil is represented by the letter ____.

Herbivores represent the

Which of the following statements is false?

The primary consumer is also

Which of the following statements is FALSE?

Nitrogen gas in the atmosphere is represented by the letter ____.

Decomposers are

The movement of oxygen and hydrogen in the form of water takes place in which cycle?

Fertilizers are represented by the letter ____.

All living organisms are dependent upon plants because

Which of the following is NOT dependent on the others as a food source?

Which cannot be placed in a single trophic level?

Carbon is introduced into the atmosphere by all of the following means EXCEPT

Deserts, rain forests, hardwood forests, and tundra are all examples of

Selecting the Exception Four of the five answers listed below are related by a common action that retains nitrogen in the biomass. Select the exception.

Farmland that is under regular and continued tillage will not

Learning About Human Biology

Chemistry of Life

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Introduction to Genetics

Chromosomes and Human Genetics

DNA, Genes, and Biotechnology

Genes and Disease: Cancer

Principles of Evolution

Human Impacts on the Biosphere

Filters