Question 1

As an overall average,about __________________ of the energy at one trophic level is available to the next highest rank in the food chain.

Accepted Answer

A) Two percent 
B) Ten percent 
C) Four percent 
D) Seven percent 
E) Twenty percent 
A) Two percent 
B) Ten percent 
C) Four percent 
D) Seven percent 
E) Twenty percent

Question 2

Nitrogen fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange obtain food from the plants.Which type of interaction is this?

Accepted Answer

A) Mutualism 
B) Commensalism 
C) Parasitism 
D) Predation 
E) Herbivory 
A) Mutualism 
B) Commensalism 
C) Parasitism 
D) Predation 
E) Herbivory

Question 3

Some scientists predict that as atmospheric carbon dioxide levels increase,the pH of the oceans will drop,threatening coral and organisms with shells.What is the best explanation for this hypothesis?

Accepted Answer

A) Carbon dioxide combines with water to form a base 
B) Carbon dioxide combines with water to form an acid 
C) As the pH of the ocean decreases, more carbon dioxide is released into the atmosphere 
D) As the pH of the ocean increases, more carbon dioxide is released into the atmosphere 
E) As the oceans warm, more water is evaporated, lowering the pH of the remaining water 
A) Carbon dioxide combines with water to form a base 
B) Carbon dioxide combines with water to form an acid 
C) As the pH of the ocean decreases, more carbon dioxide is released into the atmosphere 
D) As the pH of the ocean increases, more carbon dioxide is released into the atmosphere 
E) As the oceans warm, more water is evaporated, lowering the pH of the remaining water

Question 4

In a process called denitrification,bacteria convert ammonia to nitrites and eventually to nitrates.

Accepted Answer

A) True 
 B)False

Question 5

If there are 10,000 calories of net primary productivity in a field,how much on average will be available to a primary consumer?

Accepted Answer

A) 100 calories 
B) 10,000 calories 
C) 10 calories 
D) 1000 calories 
E) 1 calorie 
A) 100 calories 
B) 10,000 calories 
C) 10 calories 
D) 1000 calories 
E) 1 calorie

Question 6

Energy is constantly being recycled within an ecosystem.

Accepted Answer

A) True 
 B)False

Question 7

Secondary consumers:

Accepted Answer

A) Are carnivores 
B) Are herbivores 
C) Are bacteria 
D) Are fungi 
E) All are correct 
A) Are carnivores 
B) Are herbivores 
C) Are bacteria 
D) Are fungi 
E) All are correct

Question 8

Mercury released from coal burning power plants would be at the highest concentration in?

Accepted Answer

A) The phytoplankton 
B) Eagles that eat the walleye 
C) The zooplankton 
D) The minnows 
E) The walleye 
A) The phytoplankton 
B) Eagles that eat the walleye 
C) The zooplankton 
D) The minnows 
E) The walleye

Question 9

What was the purpose of repeatedly drying,freezing,and thawing some of the fungi?

Accepted Answer

A) To kill the fungi 
B) To prepare the fungi for growth at 65°C 
C) To remove the virus 
D) To prepare the fungi to infect the panic grass 
E) To make the fungus more susceptible to the virus 
A) To kill the fungi 
B) To prepare the fungi for growth at 65°C 
C) To remove the virus 
D) To prepare the fungi to infect the panic grass 
E) To make the fungus more susceptible to the virus

Question 10

Nitrogen-fixing bacteria convert N2 into _____________________.

Accepted Answer

A) Nitrates 
B) Ammonia 
C) Nitrites 
D) Carbon dioxide 
E) Methane 
A) Nitrates 
B) Ammonia 
C) Nitrites 
D) Carbon dioxide 
E) Methane

Question 11

The type of succession that occurs in an area where no community previously existed is ______________ succession.

Accepted Answer

A) Keystone 
B) Tertiary 
C) Secondary 
D) Climax 
E) Primary 
A) Keystone 
B) Tertiary 
C) Secondary 
D) Climax 
E) Primary

Question 12

Eutrophication can be caused by excess accumulation of which of the following in a body of water?

Accepted Answer

A) Nitrogen 
B) Phosphorous 
C) Carbon 
D) Nitrogen or phosphorous 
E) Nitrogen or carbon 
A) Nitrogen 
B) Phosphorous 
C) Carbon 
D) Nitrogen or phosphorous 
E) Nitrogen or carbon

Question 13

All the organisms plus the nonliving components of a defined area is a(an):

Accepted Answer

A) Population 
B) Community 
C) Ecosystem 
D) Habitat 
E) Niche 
A) Population 
B) Community 
C) Ecosystem 
D) Habitat 
E) Niche

Question 14

In the water cycle,animals return water to the environment by:

Accepted Answer

A) Transpiration and excretion 
B) Excretion 
C) Transpiration. 
D) Respiration and excretion, 
E) Excretion.. 
A) Transpiration and excretion 
B) Excretion 
C) Transpiration. 
D) Respiration and excretion, 
E) Excretion..

Question 15

The reliance of a plant on one type of insect for pollination and that insect having only the nectar of that plant as its food source is an example of coevolution.

Accepted Answer

A) True 
 B)False

Question 16

Some scientists predict that as atmospheric carbon dioxide levels increase,plant growth will also increase.What is the best explanation for this hypothesis?

Accepted Answer

A) Plants consume carbon dioxide from the atmosphere during photosynthesis 
B) Plants release carbon dioxide into the atmosphere during photosynthesis 
C) Plants consume carbon dioxide from the atmosphere during respiration 
D) Plants release carbon dioxide into the atmosphere during respiration 
A) Plants consume carbon dioxide from the atmosphere during photosynthesis 
B) Plants release carbon dioxide into the atmosphere during photosynthesis 
C) Plants consume carbon dioxide from the atmosphere during respiration 
D) Plants release carbon dioxide into the atmosphere during respiration

Question 17

Mycorrhizal fungi obtain food from plants in exchange for water and nutrients.This is an example of:

Accepted Answer

A) Commensalism 
B) Parasitism 
C) Mutualism 
D) Predation 
E) Herbivory 
A) Commensalism 
B) Parasitism 
C) Mutualism 
D) Predation 
E) Herbivory

Question 18

An example of a keystone species is a root-associated fungus that conifer trees need in order to survive and that supply food for rodents.

Accepted Answer

A) True 
 B)False

Question 19

In _______________________ multiple species use the same resource in a slightly different way or at a different time.

Accepted Answer

A) Symbiotic inclusion 
B) Resource partitioning 
C) Mutualism 
D) Intraspecific competition 
E) None of the above are correct 
A) Symbiotic inclusion 
B) Resource partitioning 
C) Mutualism 
D) Intraspecific competition 
E) None of the above are correct

Question 20

The interaction between panic grass and its endophye fungus that allow them to grow at 65°C together,but not independently is an example of ____.

Accepted Answer

A) Mutualism 
B) Commensalism 
C) Parasitism 
D) Predation 
E) Competition 
A) Mutualism 
B) Commensalism 
C) Parasitism 
D) Predation 
E) Competition

Exam 37: Communities and Ecosystems

As an overall average,about __________________ of the energy at one trophic level is available to the next highest rank in the food chain.

Nitrogen fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange obtain food from the plants.Which type of interaction is this?

Some scientists predict that as atmospheric carbon dioxide levels increase,the pH of the oceans will drop,threatening coral and organisms with shells.What is the best explanation for this hypothesis?

In a process called denitrification,bacteria convert ammonia to nitrites and eventually to nitrates.

If there are 10,000 calories of net primary productivity in a field,how much on average will be available to a primary consumer?

Energy is constantly being recycled within an ecosystem.

Secondary consumers:

Mercury released from coal burning power plants would be at the highest concentration in?

What was the purpose of repeatedly drying,freezing,and thawing some of the fungi?

Nitrogen-fixing bacteria convert N2 into _____________________.

The type of succession that occurs in an area where no community previously existed is ______________ succession.

Eutrophication can be caused by excess accumulation of which of the following in a body of water?

All the organisms plus the nonliving components of a defined area is a(an):

In the water cycle,animals return water to the environment by:

The reliance of a plant on one type of insect for pollination and that insect having only the nectar of that plant as its food source is an example of coevolution.

Some scientists predict that as atmospheric carbon dioxide levels increase,plant growth will also increase.What is the best explanation for this hypothesis?

Mycorrhizal fungi obtain food from plants in exchange for water and nutrients.This is an example of:

An example of a keystone species is a root-associated fungus that conifer trees need in order to survive and that supply food for rodents.

In _______________________ multiple species use the same resource in a slightly different way or at a different time.

The interaction between panic grass and its endophye fungus that allow them to grow at 65°C together,but not independently is an example of ____.

What Is Life

The Chemistry of Life

The Dynamic Cell

The Energy of Life

Photosynthesis

How Cells Release Energy

Dna Structure and Gene Function

Dna Replication, mitosis and the Cell Cycle

Sexual Reproduction and Meiosis

Patterns of Inheritance

The Forces of Evolutionary Change

Evidence for Evolution

Speciation and Extinction

The Origin and History of Life

Viruses

Bacteria and Archaea

Protists

Plants

Fungi

Animals

Plant Form and Function

Plant Nutrition and Transport

Reproduction and Development of Flowering Plants

Animal Tissues, organ Systems and Homeostasis

The Nervous System

The Senses Content

The Endocrine System

The Musculoskeletal System

The Circulatory System

The Respiratory System

Digestion and Animal Nutrition

Regulation of Temperature and Body Fluids

The Immune System

Animal Reproduction and Development

Animal Behavior

Populations

The Biosphere

Conserving Biodiversity

Filters

Nitrogen-fixing bacteria convert N₂ into _____________________.