Question 1

When you observe a lake that has been affected by acid deposition, you might expect to find:

Accepted Answer

A) a clear lake with high levels of metals but few fish. 
B) a murky lake with excess algal growth from the deposition of anthropogenic nitrogen. 
C) low levels of toxic metals and nutrients essential for the growth of biotic organisms. 
D) excess carbon that will contribute to global warming. 
E) high levels of dissolved sulfur dioxide. 
A) a clear lake with high levels of metals but few fish. 
B) a murky lake with excess algal growth from the deposition of anthropogenic nitrogen. 
C) low levels of toxic metals and nutrients essential for the growth of biotic organisms. 
D) excess carbon that will contribute to global warming. 
E) high levels of dissolved sulfur dioxide. A

Question 2

If a fox eats a rodent that ate a smaller insect that ate a plant, the fox is a(n):

Accepted Answer

A) autotroph. 
B) primary producer. 
C) primary consumer. 
D) secondary consumer. 
E) tertiary consumer. 
A) autotroph. 
B) primary producer. 
C) primary consumer. 
D) secondary consumer. 
E) tertiary consumer. E

Question 3

According to the data presented in the graph, between 1960 and 2000, CO2 levels rose approximately ________ ppm.

Accepted Answer

A) 320 
B) 20 
C) 50 
D) 70 
E) 370 
A) 320 
B) 20 
C) 50 
D) 70 
E) 370 C

Question 4

Burning high-sulfur coal increases acid deposition. True or False?

Accepted Answer

A) True 
 B)False

Question 5

Explain how the world's food supply may be affected by whether people eat primarily meat or vegetables.

Accepted Answer

If people eat plant materials,

Question 6

The assaults of acids dissolved in precipitation and dry particles of sulfuric acid are together known as:

Accepted Answer

A) acid rain. 
B) acid precipitation. 
C) acid deposition. 
D) acid fog. 
E) decomposition acid. 
A) acid rain. 
B) acid precipitation. 
C) acid deposition. 
D) acid fog. 
E) decomposition acid.

Question 7

Plants often grow poorly in sterilized soils because the soils lack nitrogen-fixing bacteria. True or False?

Accepted Answer

A) True 
 B)False

Question 8

A deer that gets its energy from eating plants is a(n):

Accepted Answer

A) omnivore. 
B) primary producer. 
C) herbivore. 
D) tertiary consumer. 
E) carnivore. 
A) omnivore. 
B) primary producer. 
C) herbivore. 
D) tertiary consumer. 
E) carnivore.

Question 9

The primary source of Earth's energy is the sun. True or False?

Accepted Answer

A) True 
 B)False

Question 10

In 1956, people in Minamata, Japan, began to exhibit severe neurological disorders and birth defects. This problem was eventually attributed to methylmercury, a water-insoluble and breakdown-resistant chemical formed from mercury dumped into the adjacent bay by a local factory. People who ate which of the following seafoods would you expect were most affected?

Accepted Answer

A) kelplarge, multicellular, photosynthetic protists 
B) krillsmall crustaceans that eat tiny microscopic algae 
C) mussels that feed on tiny microscopic algae 
D) sea urchins that feed on kelp 
E) tuna that feed on smaller fish that feed on krill that feed on algae 
A) kelplarge, multicellular, photosynthetic protists 
B) krillsmall crustaceans that eat tiny microscopic algae 
C) mussels that feed on tiny microscopic algae 
D) sea urchins that feed on kelp 
E) tuna that feed on smaller fish that feed on krill that feed on algae

Question 11

The majority of the energy on Earth originates from:

Accepted Answer

A) coal. 
B) nuclear sources. 
C) volcanoes. 
D) the sun. 
E) oil. 
A) coal. 
B) nuclear sources. 
C) volcanoes. 
D) the sun. 
E) oil.

Question 12

The amount of energy lost as it passes from one trophic level to another is approximately:

Accepted Answer

A) 99%. 
B) 90%. 
C) 75%. 
D) 63%. 
E) 50%. 
A) 99%. 
B) 90%. 
C) 75%. 
D) 63%. 
E) 50%.

Question 13

_______ is/are a crucial nutrient reservoir of phosphorus that is available to organisms.

Accepted Answer

A) The atmosphere 
B) Rocks 
C) Oceans 
D) Autotrophs 
E) Consumers 
A) The atmosphere 
B) Rocks 
C) Oceans 
D) Autotrophs 
E) Consumers

Question 14

On a field trip with your class to mountain lakes in Vermont, you come across a beautiful clear lake that is deep, and you can see the pebbles at its bottom. Why does your classmate hypothesize that this lake has been subjected to acidic deposition?

Accepted Answer

The lake is clear be

Question 15

The _______ are an important and often overlooked group of organisms that release nutrients to the soil or water.

Accepted Answer

A) producers 
B) heterotrophs 
C) decomposers 
D) tertiary consumers 
E) autotrophs 
A) producers 
B) heterotrophs 
C) decomposers 
D) tertiary consumers 
E) autotrophs

Question 16

One of the basic laws of ecosystems that describes the complex interaction of organisms is that ________ cycle within the community.

Accepted Answer

The answer of One of the basic laws of ecosystems...

Question 17

There is a school of thought that encourages humans to give up eating meat and become herbivores. What are the advantages to this?

Accepted Answer

By eating lower on the food ch

Question 18

Explain why a food web gives a better picture of a community than does a food chain.

Accepted Answer

A food web portrays the intera

Question 19

The hydrologic cycle is different from other nutrient cycles in that:

Accepted Answer

A) water is chemically unchanged throughout the cycle. 
B) the ocean is involved. 
C) the atmosphere is involved. 
D) the soil is not involved. 
E) water is not recycled, but flows one way through ecosystems. 
A) water is chemically unchanged throughout the cycle. 
B) the ocean is involved. 
C) the atmosphere is involved. 
D) the soil is not involved. 
E) water is not recycled, but flows one way through ecosystems.

Question 20

The primary cause of the current increase in levels of atmospheric CO2 is the human use of ________.

Accepted Answer

The answer of The primary cause of the current increase...

Exam 28: How Do Ecosystems Work

When you observe a lake that has been affected by acid deposition, you might expect to find:

If a fox eats a rodent that ate a smaller insect that ate a plant, the fox is a(n):

According to the data presented in the graph, between 1960 and 2000, CO2 levels rose approximately ________ ppm.

Burning high-sulfur coal increases acid deposition. True or False?

Explain how the world's food supply may be affected by whether people eat primarily meat or vegetables.

The assaults of acids dissolved in precipitation and dry particles of sulfuric acid are together known as:

Plants often grow poorly in sterilized soils because the soils lack nitrogen-fixing bacteria. True or False?

A deer that gets its energy from eating plants is a(n):

The primary source of Earth's energy is the sun. True or False?

The majority of the energy on Earth originates from:

The amount of energy lost as it passes from one trophic level to another is approximately:

_______ is/are a crucial nutrient reservoir of phosphorus that is available to organisms.

On a field trip with your class to mountain lakes in Vermont, you come across a beautiful clear lake that is deep, and you can see the pebbles at its bottom. Why does your classmate hypothesize that this lake has been subjected to acidic deposition?

The _______ are an important and often overlooked group of organisms that release nutrients to the soil or water.

One of the basic laws of ecosystems that describes the complex interaction of organisms is that ________ cycle within the community.

There is a school of thought that encourages humans to give up eating meat and become herbivores. What are the advantages to this?

Explain why a food web gives a better picture of a community than does a food chain.

The hydrologic cycle is different from other nutrient cycles in that:

The primary cause of the current increase in levels of atmospheric CO2 is the human use of ________.

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

The Continuity of Life: Cellular Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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