Question 1

The graph indicates that since 1960, global average temperatures have:

Accepted Answer

A) remained constant. 
B) only decreased. 
C) only increased. 
D) fluctuated but risen overall. 
E) initially increased but are now dropping. 
A) remained constant. 
B) only decreased. 
C) only increased. 
D) fluctuated but risen overall. 
E) initially increased but are now dropping.

Question 2

A snake that eats a small rabbit that feeds on grass is classified as a(n):

Accepted Answer

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

Question 3

Bacteria that live in deep-sea thermal vents use energy from inorganic hydrogen sulfide (H2S)to make organic molecules from carbon dioxide and are thus:

Accepted Answer

A) decomposers. 
B) primary consumers. 
C) producers. 
D) secondary consumers. 
E) tertiary consumers. 
A) decomposers. 
B) primary consumers. 
C) producers. 
D) secondary consumers. 
E) tertiary consumers.

Question 4

The greenhouse effect is:

Accepted Answer

A) the ability of sulfur dioxide and nitrogen oxides to retain heat in the lower atmosphere. 
B) the ability of sulfur dioxide and nitrogen oxides to retain heat in the upper atmosphere. 
C) the ability of certain gases to absorb solar heat and reflect the heat to Earth as short-wave radiation. 
D) the ability of certain gases to retain solar radiation as heat energy. 
E) the ability of structures created by humans to retain solar energy as short-wave radiation. 
A) the ability of sulfur dioxide and nitrogen oxides to retain heat in the lower atmosphere. 
B) the ability of sulfur dioxide and nitrogen oxides to retain heat in the upper atmosphere. 
C) the ability of certain gases to absorb solar heat and reflect the heat to Earth as short-wave radiation. 
D) the ability of certain gases to retain solar radiation as heat energy. 
E) the ability of structures created by humans to retain solar energy as short-wave radiation.

Question 5

If a couple was attempting to get pregnant, which foods should they eat to avoid endocrine disruptors?

Accepted Answer

A) organic grains, fruits, and vegetables 
B) high-fat salmon 
C) DDT-treated vegetables 
D) high-level carnivores like tuna 
E) meals microwaved in plastic bags 
A) organic grains, fruits, and vegetables 
B) high-fat salmon 
C) DDT-treated vegetables 
D) high-level carnivores like tuna 
E) meals microwaved in plastic bags

Question 6

In a grassland of Kansas, 1,000 grams of grass are produced per square meter per year by all the different grass species. A theoretical upper limit to the biomass of secondary consumers that can be supported in this ecosystem is:

Accepted Answer

A) 1,000 grams. 
B) 100 grams. 
C) 10 grams. 
D) 1 gram. 
E) 0)1 gram. 
A) 1,000 grams. 
B) 100 grams. 
C) 10 grams. 
D) 1 gram. 
E) 0)1 gram.

Question 7

What are some possible consequences of global warming?

Accepted Answer

The models that predict the effects of g

Question 8

The aquifers are underground reservoirs in the hydrologic cycle. True or False?

Accepted Answer

A) True 
 B)False

Question 9

Which ecosystems are more productive: tropical rain forests or northern coniferous forests? Why?

Accepted Answer

Tropical rain forests are more

Question 10

Suppose a gardener puts a chemical on the soil that kills off all the detritus feeders and decomposers. What would happen to the garden?

Accepted Answer

Nutrients could not be recycle

Question 11

One of the basic laws of ecosystems that describes the complex interaction of organisms is that ________ flows through the community.

Accepted Answer

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

Question 12

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

Accepted Answer

Wastes would accumul

Question 13

In nitrogen-limited ecosystems, legumes often dominate over other plants because they:

Accepted Answer

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

Question 14

Farmers often include legumes as part of their normal crop rotation. This practice increases the overall production of their crops by:

Accepted Answer

A) adding nitrogen to the soil. 
B) adding phosphorus to the soil. 
C) helping the soil retain water better. 
D) making the soil less acidic. 
E) suppressing the growth of weeds. 
A) adding nitrogen to the soil. 
B) adding phosphorus to the soil. 
C) helping the soil retain water better. 
D) making the soil less acidic. 
E) suppressing the growth of weeds.

Question 15

The amount of life that an ecosystem can support is determined primarily by the:

Accepted Answer

A) efficiency of the consumers. 
B) number of producers and their efficiency. 
C) number of heterotrophs. 
D) number of chemoautotrophs. 
E) efficiency of the heterotrophs. 
A) efficiency of the consumers. 
B) number of producers and their efficiency. 
C) number of heterotrophs. 
D) number of chemoautotrophs. 
E) efficiency of the heterotrophs.

Question 16

Minerals that are needed in only trace amounts are macronutrients. True or False?

Accepted Answer

A) True 
 B)False

Question 17

Why are acid rain or acid deposition more of a problem in certain areas, such as New England, than in others?

Accepted Answer

Prevailing winds carry nitrogen oxides a

Question 18

If you are attempting to minimize the amount of mercury in your diet, you should eat:

Accepted Answer

A) omnivores like hogs. 
B) low-level carnivores like tilapia. 
C) herbivores like cattle. 
D) high-level carnivores like tuna. 
E) producers like fruits and vegetables. 
A) omnivores like hogs. 
B) low-level carnivores like tilapia. 
C) herbivores like cattle. 
D) high-level carnivores like tuna. 
E) producers like fruits and vegetables.

Question 19

Organisms that produce their own food in photosynthesis are known as producers, or ________.

Accepted Answer

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

Question 20

The three major reservoirs of carbon are:

Accepted Answer

A) rocks, the atmosphere, and guano. 
B) acid precipitation, carbon-fixing bacteria, and oceans. 
C) soil, water, and the atmosphere. 
D) fossil fuels, legumes, and micronutrients. 
E) oceans, the atmosphere, and fossil fuels. 
A) rocks, the atmosphere, and guano. 
B) acid precipitation, carbon-fixing bacteria, and oceans. 
C) soil, water, and the atmosphere. 
D) fossil fuels, legumes, and micronutrients. 
E) oceans, the atmosphere, and fossil fuels.

Exam 28: How Do Ecosystems Work

The graph indicates that since 1960, global average temperatures have:

A snake that eats a small rabbit that feeds on grass is classified as a(n):

Bacteria that live in deep-sea thermal vents use energy from inorganic hydrogen sulfide (H2S)to make organic molecules from carbon dioxide and are thus:

The greenhouse effect is:

If a couple was attempting to get pregnant, which foods should they eat to avoid endocrine disruptors?

In a grassland of Kansas, 1,000 grams of grass are produced per square meter per year by all the different grass species. A theoretical upper limit to the biomass of secondary consumers that can be supported in this ecosystem is:

What are some possible consequences of global warming?

The aquifers are underground reservoirs in the hydrologic cycle. True or False?

Which ecosystems are more productive: tropical rain forests or northern coniferous forests? Why?

Suppose a gardener puts a chemical on the soil that kills off all the detritus feeders and decomposers. What would happen to the garden?

One of the basic laws of ecosystems that describes the complex interaction of organisms is that ________ flows through the community.

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

In nitrogen-limited ecosystems, legumes often dominate over other plants because they:

Farmers often include legumes as part of their normal crop rotation. This practice increases the overall production of their crops by:

The amount of life that an ecosystem can support is determined primarily by the:

Minerals that are needed in only trace amounts are macronutrients. True or False?

Why are acid rain or acid deposition more of a problem in certain areas, such as New England, than in others?

If you are attempting to minimize the amount of mercury in your diet, you should eat:

Organisms that produce their own food in photosynthesis are known as producers, or ________.

The three major reservoirs of carbon are:

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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