Question 1

Groups of different species living together in a particular place with a potential for interacting with one another is called a(n)

Accepted Answer

A) organism 
B) population 
C) community 
D) ecosystem 
E) biosphere

Question 2

The major reservoir for nitrogen is the ____________________.

Accepted Answer

The answer of The major reservoir for nitrogen is the...

Question 3

Organisms that complete the final breakdown and recycling of organic materials from the remains of all organisms are the

Accepted Answer

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

Question 4

All life is based on the power of the sun.

Accepted Answer

A) True 
 B)False

Question 5

Nutrient cycles connect past, present, and future forms of life.

Accepted Answer

A) True 
 B)False

Question 6

All physical forms of water (solid, liquid, and gas) make up the

Accepted Answer

A) atmosphere 
B) lithosphere 
C) biosphere 
D) hydrosphere 
E) troposphere

Question 7

Which of the following is not a reason we should care about the disappearance of the tropical rain forests?

Accepted Answer

A) their loss will reduce earth's biodiversity 
B) their loss will accelerate atmospheric warming 
C) their loss will change regional weather patterns 
D) their loss will mean more places to build cities 
E) their loss may push us beyond an ecological tipping point

Question 8

Humans intervene in the nitrogen cycle in several ways.Which of the following is not one of those ways?

Accepted Answer

A) Burning fossil fuels adds nitric oxide. 
B) Agriculture releases nitrous oxides. 
C) Destruction of forests releases nitrogen. 
D) We store nitrogen in the topsoil when we harvest nitrogen rich crops. 
E) Agriculture using fertilizers adds nitrogen to aquatic systems.

Question 9

Which of the following is not a major component of the earth's life-support system?

Accepted Answer

A) unisphere 
B) atmosphere 
C) hydrosphere 
D) geosphere 
E) biosphere

Question 10

Each trophic level in a food chain or food web contains a certain amount of organic matter, called

Accepted Answer

A) food 
B) energy 
C) biomass 
D) organisms 
E) decomposition

Question 11

In hundreds of years we have released large quantities of fossil fuels that took millions of years to form.

Accepted Answer

A) True 
 B)False

Question 12

Ecology is the study of

Accepted Answer

A) human impact on the environment 
B) the abiotic elements of the environment 
C) the biotic elements of the environment 
D) how organisms interact with each other and the nonliving environment 
E) how evolution formed populations

Question 13

Because carbon makes up such a small amount of the earth's atmosphere, even a small change, caused by nature or by humans, affects the earth's climate.

Accepted Answer

A) True 
 B)False

Question 14

Use the Figure above to answer the following question(s).
-Why would there be fewer organisms at level A than at any level below it?

Accepted Answer

The answer of  
Use the Figure above to answer...

Question 15

_______________ are by far the most productive aquatic ecosystem when measured as average net primary productivity per square meter per year.

Accepted Answer

The answer of _______________ are by far the most productive...

Question 16

Use the Figure above to answer the following question(s).
-How many kilocalories have been lost between level A and level D?

Accepted Answer

The answer of  
Use the Figure above to answer...

Question 17

A sequence of organisms, each of which serves as a source of food or energy for the next, is called a(n) ____________________.

Accepted Answer

The answer of A sequence of organisms, each of which...

Question 18

The oceans of the earth cover approximately what percentage of the earth's surface?

Accepted Answer

A) 3% 
B) 29% 
C) 51% 
D) 71% 
E) 97%

Question 19

Nitrogen is a major component of all of the following except

Accepted Answer

A) proteins 
B) nucleic acids 
C) groundwater 
D) ammonia 
E) DNA

Question 20

Carbon is a major component of

Accepted Answer

A) water 
B) the oceans 
C) organic compounds 
D) the atmosphere 
E) hydrologic cycle

Exam 3: Ecosystems: What Are They and How Do They Work

Groups of different species living together in a particular place with a potential for interacting with one another is called a(n)

The major reservoir for nitrogen is the ____________________.

Organisms that complete the final breakdown and recycling of organic materials from the remains of all organisms are the

All life is based on the power of the sun.

Nutrient cycles connect past, present, and future forms of life.

All physical forms of water (solid, liquid, and gas) make up the

Which of the following is not a reason we should care about the disappearance of the tropical rain forests?

Humans intervene in the nitrogen cycle in several ways.Which of the following is not one of those ways?

Which of the following is not a major component of the earth's life-support system?

Each trophic level in a food chain or food web contains a certain amount of organic matter, called

In hundreds of years we have released large quantities of fossil fuels that took millions of years to form.

Ecology is the study of

Because carbon makes up such a small amount of the earth's atmosphere, even a small change, caused by nature or by humans, affects the earth's climate.

Use the Figure above to answer the following question(s). -Why would there be fewer organisms at level A than at any level below it?

_______________ are by far the most productive aquatic ecosystem when measured as average net primary productivity per square meter per year.

Use the Figure above to answer the following question(s). -How many kilocalories have been lost between level A and level D?

A sequence of organisms, each of which serves as a source of food or energy for the next, is called a(n) ____________________.

The oceans of the earth cover approximately what percentage of the earth's surface?

Nitrogen is a major component of all of the following except

Carbon is a major component of