Question 1

The nitrogen in your body came from the

Accepted Answer

A)  proteins in the food you eat. 
B)  carbohydrates in the food you eat. 
C)  air you breathe. 
D)  water you drink. 
A)  proteins in the food you eat. 
B)  carbohydrates in the food you eat. 
C)  air you breathe. 
D)  water you drink.

Question 2

____ is a biotic factor in an ecosystem.

Accepted Answer

A)  Water 
B)  Light 
C)  Soil 
D)  A bacterium 
A)  Water 
B)  Light 
C)  Soil 
D)  A bacterium

Question 3

The atmosphere contains approximately ____ percent nitrogen.

Accepted Answer

A)  2 
B)  10 
C)  50 
D)  80 
A)  2 
B)  10 
C)  50 
D)  80

Question 4

Marine algae would be considered a part of which trophic level?

Accepted Answer

A)  producer 
B)  primary consumer 
C)  secondary consumer 
D)  tertiary consumer 
A)  producer 
B)  primary consumer 
C)  secondary consumer 
D)  tertiary consumer

Question 5

Which of the following would be at the highest trophic level?

Accepted Answer

A)  a lion 
B)  a grasshopper 
C)  a mushroom 
D)  a grass plant 
A)  a lion 
B)  a grasshopper 
C)  a mushroom 
D)  a grass plant

Question 6

The nitrogen found in carnivores would follow which of the following paths?

Accepted Answer

A)  plant $\rightarrow$ air $\rightarrow$carnivore 
B)  herbivore $\rightarrow$plant $\rightarrow$ air $\rightarrow$ carnivore 
C)  air $\rightarrow$ bacteria$\rightarrow$plant $\rightarrow$herbivore $\rightarrow$carnivore 
D)  air $\rightarrow$plant $\rightarrow$bacteria $\rightarrow$herbivore $\rightarrow$ carnivore 
A)  plant $\rightarrow$ air $\rightarrow$carnivore 
B)  herbivore $\rightarrow$plant $\rightarrow$ air $\rightarrow$ carnivore 
C)  air $\rightarrow$ bacteria$\rightarrow$plant $\rightarrow$herbivore $\rightarrow$carnivore 
D)  air $\rightarrow$plant $\rightarrow$bacteria $\rightarrow$herbivore $\rightarrow$ carnivore

Question 7

The source of energy for nearly all ecosystems is

Accepted Answer

A)  the sun. 
B)  food. 
C)  oxygen. 
D)  water. 
A)  the sun. 
B)  food. 
C)  oxygen. 
D)  water.

Question 8

The environment of an organism would include its

Accepted Answer

A)  enemies. 
B)  food. 
C)  diseases. 
D)  All of these answers are true. 
A)  enemies. 
B)  food. 
C)  diseases. 
D)  All of these answers are true.

Question 9

The following sequence of organisms represents all of the following except trees $\rightarrow$ insects$\rightarrow$spiders $\rightarrow$ frogs $\rightarrow$ fish $\rightarrow$human

Accepted Answer

A)  a food chain. 
B)  a food web. 
C)  the flow of energy through the community. 
D)  the flow of nutrients through the community. 
A)  a food chain. 
B)  a food web. 
C)  the flow of energy through the community. 
D)  the flow of nutrients through the community.

Question 10

Grass, mice, snakes, and hawks living together in the same geographic area constitute a/an

Accepted Answer

A)  ecosystem. 
B)  abiotic factor. 
C)  community. 
D)  environment. 
A)  ecosystem. 
B)  abiotic factor. 
C)  community. 
D)  environment.

Question 11

The most energy is contained within the ____ in the figure diagram above.

Accepted Answer

A)  human 
B)  frogs 
C)  trees 
D)  Each level contains identical amounts of energy. (Energy cannot be created or destroyed.) 
A)  human 
B)  frogs 
C)  trees 
D)  Each level contains identical amounts of energy. (Energy cannot be created or destroyed.)

Question 12

Which one of the following is NOT true of biomass?

Accepted Answer

A)  Biomass is greatest in producers. 
B)  Biomass is a measure of productivity. 
C)  Biomass is the dry weight of organisms. 
D)  Biomass shows a loss of 10% at each trophic level. 
A)  Biomass is greatest in producers. 
B)  Biomass is a measure of productivity. 
C)  Biomass is the dry weight of organisms. 
D)  Biomass shows a loss of 10% at each trophic level.

Question 13

If the world were to support the largest possible human population, all humans would need to be

Accepted Answer

A)  carnivores. 
B)  omnivores. 
C)  herbivores. 
D)  producers. 
A)  carnivores. 
B)  omnivores. 
C)  herbivores. 
D)  producers.

Question 14

All of the ____ are a community.

Accepted Answer

A)  sugar maple trees on Earth 
B)  living organisms in a forest 
C)  squirrels in a forest 
D)  living and nonliving things in the forest 
A)  sugar maple trees on Earth 
B)  living organisms in a forest 
C)  squirrels in a forest 
D)  living and nonliving things in the forest

Question 15

Which of the following is the BEST example of a primary carnivore?

Accepted Answer

A)  lion 
B)  corn plant 
C)  shark 
D)  goat 
A)  lion 
B)  corn plant 
C)  shark 
D)  goat

Question 16

If decomposers ceased to exist, you would expect

Accepted Answer

A)  photosynthesis to stop. 
B)  organic matter to build up. 
C)  few changes. 
D)  increased numbers of herbivores. 
A)  photosynthesis to stop. 
B)  organic matter to build up. 
C)  few changes. 
D)  increased numbers of herbivores.

Question 17

Which of the following nutrient cycles relies heavily on the role of bacteria?

Accepted Answer

A)  carbon cycle 
B)  hydrologic cycle 
C)  nitrogen cycle 
D)  phosphorus cycle 
A)  carbon cycle 
B)  hydrologic cycle 
C)  nitrogen cycle 
D)  phosphorus cycle

Question 18

Which of the following is likely to have the lowest numbers in an ecosystem?

Accepted Answer

A)  producers 
B)  carnivores 
C)  herbivores 
D)  consumers 
A)  producers 
B)  carnivores 
C)  herbivores 
D)  consumers

Question 19

____ convert nitrogen gas to nitrogen that plants can use.

Accepted Answer

A)  Decomposers 
B)  Nitrogen-fixing bacteria 
C)  Nitrifying bacteria 
D)  Denitrifying bacteria 
A)  Decomposers 
B)  Nitrogen-fixing bacteria 
C)  Nitrifying bacteria 
D)  Denitrifying bacteria

Question 20

The insects in the diagram above represent all of the following except

Accepted Answer

A)  herbivores. 
B)  the second trophic level. 
C)  primary consumers. 
D)  producers. 
A)  herbivores. 
B)  the second trophic level. 
C)  primary consumers. 
D)  producers.

Exam 15: Ecosystem Dynamics: The Flow of Energy and Matter

The nitrogen in your body came from the

____ is a biotic factor in an ecosystem.

The atmosphere contains approximately ____ percent nitrogen.

Marine algae would be considered a part of which trophic level?

Which of the following would be at the highest trophic level?

The nitrogen found in carnivores would follow which of the following paths?

The source of energy for nearly all ecosystems is

The environment of an organism would include its

The following sequence of organisms represents all of the following except trees →\rightarrow→ insects →\rightarrow→ spiders →\rightarrow→ frogs →\rightarrow→ fish →\rightarrow→ human

Grass, mice, snakes, and hawks living together in the same geographic area constitute a/an

The most energy is contained within the ____ in the figure diagram above.

Which one of the following is NOT true of biomass?

If the world were to support the largest possible human population, all humans would need to be

All of the ____ are a community.

Which of the following is the BEST example of a primary carnivore?

If decomposers ceased to exist, you would expect

Which of the following nutrient cycles relies heavily on the role of bacteria?

Which of the following is likely to have the lowest numbers in an ecosystem?

____ convert nitrogen gas to nitrogen that plants can use.

The insects in the diagram above represent all of the following except

What Is Biology

The Basics of Life: Chemistry

Organic Molecules: The Molecules of Life

Cell Structure and Function

Enzymes, Coenzymes, and Energy

Biochemical Pathways: Cellular Respiration

Biochemical Pathways: Photosynthesis

DNA and RNA: The Molecular Basis of Heredity

Cell Division: Proliferation and Reproduction

Patterns of Inheritance

Applications of Biotechnology

Diversity Within Species and Population Genetics

Evolution and Natural Selection

The Formation of Species and Evolutionary Change

Community Interactions

Population Ecology

Evolutionary and Ecological Aspects of Behavior

The Origin of Life and the Evolution of Cells

The Classification and Evolution of Organisms

The Nature of Microorganisms

The Plant Kingdom

The Animal Kingdom

Materials Exchange in the Body

Nutrition: Food and Diet

The Bodys Control Mechanisms and Immunity

Human Reproduction, Sex, and Sexuality

Filters

The following sequence of organisms represents all of the following except trees $\rightarrow$ insects $\rightarrow$ spiders $\rightarrow$ frogs $\rightarrow$ fish $\rightarrow$ human