Question 1

is (are) a crucial nutrient reservoir of phosphorus that is available to organisms.

Accepted Answer

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

Question 2

What proportion of the solar radiation that reaches Earth's surface is visible light?

Accepted Answer

A)  It is captured by plants and used in photosynthesis. 
B)  About half is visible light. 
C)  About 90% of it is visible light. 
D)  Most of the radiation is absorbed by rocks on Earth's crust. 
E)  A small fraction is visible light. 
A)  It is captured by plants and used in photosynthesis. 
B)  About half is visible light. 
C)  About 90% of it is visible light. 
D)  Most of the radiation is absorbed by rocks on Earth's crust. 
E)  A small fraction is visible light.

Question 3

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

Accepted Answer

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

Question 4

What would happen to an ecosystem if all the plants died?

Accepted Answer

Oxygen levels would

Question 5

The primary consumers in marine food chains are phytoplankton.

Accepted Answer

A) True 
 B)False

Question 6

Plants absorb small amounts of carbon from the soil in the form of simple sugars or monosaccharides.

Accepted Answer

A) True 
 B)False

Question 7

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 8

A rancher begins raising sheep on the land next to the habitat shown. After losing several lambs, he removes all the wolves. By the next year, he can expect to find a(n)

Accepted Answer

A)  increased hare population. 
B)  decreased pheasant population. 
C)  decreased antelope population. 
D)  decreased owl population. 
A)  increased hare population. 
B)  decreased pheasant population. 
C)  decreased antelope population. 
D)  decreased owl population.

Question 9

Bacteria and fungi that secrete enzymes into the surrounding environment to break down wastes and dead organic matter are .

Accepted Answer

The answer of Bacteria and fungi that secrete enzymes into...

Question 10

Plants produce biomass by taking in energy, CO2, and nutrients from the environment; consumers eat much of this biomass, but not all. However, ecosystems do not indefinitely accumulate large quantities of organic matter over time. Why not?

Accepted Answer

When consumers eat plant organic matter,

Question 11

The primary source of Earth's energy is the sun.

Accepted Answer

A) True 
 B)False

Question 12

If a couple was attempting to get pregnant, which foods should they eat to avoid ingesting high amounts of toxins?

Accepted Answer

A)  High- level carnivores such as tuna 
B)  High- fat salmon 
C)  DDT- treated vegetables 
D)  Meals microwaved in plastic bags 
E)  Organic grains, fruits, and vegetables 
A)  High- level carnivores such as tuna 
B)  High- fat salmon 
C)  DDT- treated vegetables 
D)  Meals microwaved in plastic bags 
E)  Organic grains, fruits, and vegetables

Question 13

Organisms that must rely on complex, high- energy molecules produced by other organisms for survival are

Accepted Answer

A)  autotrophs. 
B)  heterotrophs. 
C)  denitrifying bacteria. 
D)  producers. 
E)  cyanobacteria. 
A)  autotrophs. 
B)  heterotrophs. 
C)  denitrifying bacteria. 
D)  producers. 
E)  cyanobacteria.

Question 14

Why is it so hard to make definite predictions about the amount and timing of global warming as a result of greenhouse gases?

Accepted Answer

So many factors are interactin

Question 15

Nitrogen is the most abundant element in the atmosphere, and a crucial component of proteins, vitamins, and nucleic acids. However, plants and other producers cannot use nitrogen in its natural form (N2). Nitrogen has to undergo a process called nitrogen fixation. What does this process involve?

Accepted Answer

A)  Ammonia is converted to nitrate. 
B)  It is the synthesis of ammonia from nitrogen gas by certain bacteria. 
C)  Nitrate is converted to ammonia. 
D)  Nitrogen is accumulated in dead organic matter. 
E)  It is undertaken by denitrifying bacteria. 
A)  Ammonia is converted to nitrate. 
B)  It is the synthesis of ammonia from nitrogen gas by certain bacteria. 
C)  Nitrate is converted to ammonia. 
D)  Nitrogen is accumulated in dead organic matter. 
E)  It is undertaken by denitrifying bacteria.

Question 16

Herbivores occupy the trophic level of consumer.

Accepted Answer

The answer of Herbivores occupy the trophic level of consumer....

Question 17

If a field contains approximately 1,000 kilocalories of energy in grass, which is eaten by crickets, which are eaten by birds, then approximately how many kilocalories of energy could be in the birds that live in this field?

Accepted Answer

A)  90 
B)  1,000 
C)  100 
D)  10 
E)  900 
A)  90 
B)  1,000 
C)  100 
D)  10 
E)  900

Question 18

What would happen if there were no denitrifying bacteria?

Accepted Answer

The atmosphere would

Question 19

What would happen in an ecosystem without decomposers and detritus feeders?

Accepted Answer

Wastes would accumul

Question 20

The major reservoir in the nitrogen cycle is the water.

Accepted Answer

A) True 
 B)False

Exam 29: Energy Flow and Nutrient Cycling in Ecosystems

is (are) a crucial nutrient reservoir of phosphorus that is available to organisms.

What proportion of the solar radiation that reaches Earth's surface is visible light?

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

What would happen to an ecosystem if all the plants died?

The primary consumers in marine food chains are phytoplankton.

Plants absorb small amounts of carbon from the soil in the form of simple sugars or monosaccharides.

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

A rancher begins raising sheep on the land next to the habitat shown. After losing several lambs, he removes all the wolves. By the next year, he can expect to find a(n)

Bacteria and fungi that secrete enzymes into the surrounding environment to break down wastes and dead organic matter are .

Plants produce biomass by taking in energy, CO2, and nutrients from the environment; consumers eat much of this biomass, but not all. However, ecosystems do not indefinitely accumulate large quantities of organic matter over time. Why not?

The primary source of Earth's energy is the sun.

If a couple was attempting to get pregnant, which foods should they eat to avoid ingesting high amounts of toxins?

Organisms that must rely on complex, high- energy molecules produced by other organisms for survival are

Why is it so hard to make definite predictions about the amount and timing of global warming as a result of greenhouse gases?

Nitrogen is the most abundant element in the atmosphere, and a crucial component of proteins, vitamins, and nucleic acids. However, plants and other producers cannot use nitrogen in its natural form (N2). Nitrogen has to undergo a process called nitrogen fixation. What does this process involve?

Herbivores occupy the trophic level of consumer.

If a field contains approximately 1,000 kilocalories of energy in grass, which is eaten by crickets, which are eaten by birds, then approximately how many kilocalories of energy could be in the birds that live in this field?

What would happen if there were no denitrifying bacteria?

What would happen in an ecosystem without decomposers and detritus feeders?

The major reservoir in the nitrogen cycle is the water.

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

Cellular Reproduction

Meiosis: the Basis of Sexual 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 Amid 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

Filters

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

Plants produce biomass by taking in energy, CO₂, and nutrients from the environment; consumers eat much of this biomass, but not all. However, ecosystems do not indefinitely accumulate large quantities of organic matter over time. Why not?