Question 1

Which nutrient cycle lacks an atmospheric reservoir?

Accepted Answer

A)  Nitrogen 
B)  Oxygen 
C)  Carbon 
D)  Phosphorus 
E)  Water 
A)  Nitrogen 
B)  Oxygen 
C)  Carbon 
D)  Phosphorus 
E)  Water

Question 2

Which trophic level has the LEAST biological magnification?

Accepted Answer

A)  Tertiary consumers 
B)  Heterotrophs 
C)  Secondary consumers 
D)  Primary consumers 
E)  Primary producers 
A)  Tertiary consumers 
B)  Heterotrophs 
C)  Secondary consumers 
D)  Primary consumers 
E)  Primary producers

Question 3

A carnivore is usually a(n)

Accepted Answer

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

Question 4

The present range of the sugar maple in North America extends from the Atlantic Ocean west to the Mississippi River and from southern Ontario, Quebec, and New Brunswick south to Tennessee and Virginia. If the global temperature rises 10°C in the future, where will the range of sugar maples be found?

Accepted Answer

A)  Farther south 
B)  Farther west 
C)  Farther north 
D)  In the same place; global warming will not affect the heat tolerance of plants. 
E)  Nowhere; sugar maples will become extinct. 
A)  Farther south 
B)  Farther west 
C)  Farther north 
D)  In the same place; global warming will not affect the heat tolerance of plants. 
E)  Nowhere; sugar maples will become extinct.

Question 5

The atoms that make up the molecules in our bodies

Accepted Answer

A)  have nearly all been on Earth throughout its entire history. 
B)  were all formed recently by nuclear fusion on the sun. 
C)  were once part of a dinosaur. 
D)  will be lost back to space soon after we die. 
E)  came from a wooly mammoth. 
A)  have nearly all been on Earth throughout its entire history. 
B)  were all formed recently by nuclear fusion on the sun. 
C)  were once part of a dinosaur. 
D)  will be lost back to space soon after we die. 
E)  came from a wooly mammoth.

Question 6

Organisms that produce their own food in photosynthesis are known as producers, or__________(?self-feeders?).

Accepted Answer

The answer of Organisms that produce their own food in...

Question 7

Sulfur dioxide is a natural product of volcanoes and hot springs, and by itself, it is not acidic. How, then, is excess sulfur dioxide linked to acid rain or acid deposition?

Accepted Answer

When it combines with water vapor in the

Question 8

Many climatologists blame the recent extremes in weather on global warning.

Accepted Answer

A) True 
 B)False

Question 9

In an area with nitrogen-poor soil, legumes often dominate over other plants because they

Accepted Answer

A)  have unique access to the large atmospheric pool of nitrogen thanks to their symbiotic bacteria. 
B)  do not need nitrogen at all. 
C)  have long taproots that can extract nitrogen from deeper down in the soil. 
D)  obtain supplemental nitrogen by trapping insects and other prey. 
E)  inhibit the growth of denitrifying bacteria around their roots, thus keeping more nitrate in the soil. 
A)  have unique access to the large atmospheric pool of nitrogen thanks to their symbiotic bacteria. 
B)  do not need nitrogen at all. 
C)  have long taproots that can extract nitrogen from deeper down in the soil. 
D)  obtain supplemental nitrogen by trapping insects and other prey. 
E)  inhibit the growth of denitrifying bacteria around their roots, thus keeping more nitrate in the soil.

Question 10

This graph, which is based on estimates from the International Panel on Climate Change (IPCC), shows that by 2100, global temperatures may rise as much as __________above average levels in 2000. The dashed data line represents a high growth of greenhouse gas, the dotted data line represents a moderate growth of greenhouse gas, and the square data line represents a substantially reduced growth of greenhouse gas.

Accepted Answer

A)  3°C 
B)  2.5°C 
C)  nearly 4°C 
D)  1°C 
E)  nearly 2°C 
A)  3°C 
B)  2.5°C 
C)  nearly 4°C 
D)  1°C 
E)  nearly 2°C

Question 11

Aquifers are underground reservoirs in the hydrologic cycle.

Accepted Answer

A) True 
 B)False

Question 12

Autotrophs gain energy from

Accepted Answer

A)  omnivores. 
B)  secondary producers. 
C)  secondary consumers. 
D)  primary producers. 
E)  the sun and inorganic nutrients. 
A)  omnivores. 
B)  secondary producers. 
C)  secondary consumers. 
D)  primary producers. 
E)  the sun and inorganic nutrients.

Question 13

One of the basic principles of ecosystems is that__________ cycle within the ecosystems.

Accepted Answer

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

Question 14

Herbivores occupy the trophic level of__________ consumer.

Accepted Answer

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

Question 15

Ornithologists have noted that Mexican Jays in Arizona are nesting 10 days earlier in the springtime today than they did in the 1970s. They suggest that this behavior is evidence of__________.

Accepted Answer

global war

Question 16

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

Accepted Answer

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

Question 17

Horses and cows are primary consumers.

Accepted Answer

A) True 
 B)False

Question 18

A carnivorous plant, such as a sundew, may be considered both a __________when it eats a carnivorous spider.

Accepted Answer

A)  producer and a tertiary consumer 
B)  primary consumer and a tertiary consumer 
C)  producer and a secondary consumer 
D)  producer and a primary consumer 
E)  primary consumer and a secondary consumer 
A)  producer and a tertiary consumer 
B)  primary consumer and a tertiary consumer 
C)  producer and a secondary consumer 
D)  producer and a primary consumer 
E)  primary consumer and a secondary consumer

Question 19

The level of environmental toxins such as DDT decreases as you move into the higher trophic levels.

Accepted Answer

A) True 
 B)False

Question 20

Plants cannot fix nitrogen, but legumes are often called nitrogen fixers. Explain why this label is appropriate.

Accepted Answer

Legumes have a mutua

Exam 29: Energy Flow and Nutrient Cycling in Ecosystems

Which nutrient cycle lacks an atmospheric reservoir?

Which trophic level has the LEAST biological magnification?

A carnivore is usually a(n)

The atoms that make up the molecules in our bodies

Organisms that produce their own food in photosynthesis are known as producers, or__________(?self-feeders?).

Sulfur dioxide is a natural product of volcanoes and hot springs, and by itself, it is not acidic. How, then, is excess sulfur dioxide linked to acid rain or acid deposition?

Many climatologists blame the recent extremes in weather on global warning.

In an area with nitrogen-poor soil, legumes often dominate over other plants because they

Aquifers are underground reservoirs in the hydrologic cycle.

Autotrophs gain energy from

One of the basic principles of ecosystems is that__________ cycle within the ecosystems.

Herbivores occupy the trophic level of__________ consumer.

Ornithologists have noted that Mexican Jays in Arizona are nesting 10 days earlier in the springtime today than they did in the 1970s. They suggest that this behavior is evidence of__________.

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

Horses and cows are primary consumers.

A carnivorous plant, such as a sundew, may be considered both a __________when it eats a carnivorous spider.

The level of environmental toxins such as DDT decreases as you move into the higher trophic levels.

Plants cannot fix nitrogen, but legumes are often called nitrogen fixers. Explain why this label is appropriate.

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

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