Question 1

Bacteria can function in all the following roles in an ecosystem, except as a

Accepted Answer

A) primary producer. 
B) consumer. 
C) decomposer. 
D) parasite. 
E) All of these choices are correct. 
A) primary producer. 
B) consumer. 
C) decomposer. 
D) parasite. 
E) All of these choices are correct. E

Question 2

As energy is transferred to the next trophic level, how much of it is generally lost as heat?

Accepted Answer

A) None 
B) 5% 
C) 10% 
D) 50% 
E) 90% 
A) None 
B) 5% 
C) 10% 
D) 50% 
E) 90% E

Question 3

Which trophic level forms the base of a food chain?

Accepted Answer

A) primary consumers 
B) quarternary consumers 
C) secondary consumers 
D) primary producers 
E) tertiary consumers 
A) primary consumers 
B) quarternary consumers 
C) secondary consumers 
D) primary producers 
E) tertiary consumers D

Question 4

Finding __________ in water is a good indication that it has been fecally contaminated.

Accepted Answer

The answer of Finding __________ in water is a good...

Question 5

The terrestrial realm of the biosphere is distributed into particular climatic regions called

Accepted Answer

A) niches. 
B) habitats. 
C) populations. 
D) communities. 
E) biomes. 
A) niches. 
B) habitats. 
C) populations. 
D) communities. 
E) biomes.

Question 6

Living or dead organisms that occupy an organism's habitat are called biotic factors.

Accepted Answer

A) True 
 B)False

Question 7

The niche of an organism includes all of the following, except

Accepted Answer

A) nutritional intake. 
B) position in the community structure. 
C) rate of population growth. 
D) number of offspring it produces. 
E) All of these choices are correct. 
A) nutritional intake. 
B) position in the community structure. 
C) rate of population growth. 
D) number of offspring it produces. 
E) All of these choices are correct.

Question 8

Which of the following is a nitrifying microbe?

Accepted Answer

A) Nitrosospira 
B) Nitrosobacter 
C) Nitrosococcus 
D) Nitrosomonas 
E) All of these choices are correct. 
A) Nitrosospira 
B) Nitrosobacter 
C) Nitrosococcus 
D) Nitrosomonas 
E) All of these choices are correct.

Question 9

Which of the following water-borne pathogens are protozoans?

Accepted Answer

A) Vibrio 
B) Hepatitis A 
C) Giardia 
D) Shigella 
E) Norwalk virus 
A) Vibrio 
B) Hepatitis A 
C) Giardia 
D) Shigella 
E) Norwalk virus

Question 10

The main decomposers are the fungi and bacteria.

Accepted Answer

A) True 
 B)False

Question 11

Indicator bacteria are

Accepted Answer

A) coliforms. 
B) gram-negative rods. 
C) evidence of fecal contamination. 
D) used in water quality tests. 
E) All of these choices are correct. 
A) coliforms. 
B) gram-negative rods. 
C) evidence of fecal contamination. 
D) used in water quality tests. 
E) All of these choices are correct.

Question 12

Most of the zooplankton and phyoplankton in a lake will be located in the

Accepted Answer

A) benthic zone. 
B) photic zone. 
C) produndal zone. 
D) littoral zone. 
E) Plankton will be distributed among each of these zones. 
A) benthic zone. 
B) photic zone. 
C) produndal zone. 
D) littoral zone. 
E) Plankton will be distributed among each of these zones.

Question 13

Carbon dioxide (CO2) is

Accepted Answer

A) removed from the atmosphere during photosynthesis. 
B) a source of carbon. 
C) returned to the atmosphere during respiration and fermentation. 
D) used by marine organisms to make limestone for their hard shells. 
E) All of these choices are correct. 
A) removed from the atmosphere during photosynthesis. 
B) a source of carbon. 
C) returned to the atmosphere during respiration and fermentation. 
D) used by marine organisms to make limestone for their hard shells. 
E) All of these choices are correct.

Question 14

Describe the carbon cycle from the atmosphere to the primary producers and back again.

Accepted Answer

The carbon cycle is the process by which

Question 15

The thin envelope of life that surrounds the Earth's surface is called the

Accepted Answer

A) atmosphere. 
B) biosphere. 
C) lithosphere. 
D) hydrosphere. 
E) ecosystem. 
A) atmosphere. 
B) biosphere. 
C) lithosphere. 
D) hydrosphere. 
E) ecosystem.

Question 16

How does methyl mercury affect living things?

Accepted Answer

A) It interferes with translation of mRNA. 
B) It interferes with DNA replication. 
C) It inhibits transcription. 
D) It precipitates proteins. 
E) It inhibits the electron transport chain during cellular respiration. 
A) It interferes with translation of mRNA. 
B) It interferes with DNA replication. 
C) It inhibits transcription. 
D) It precipitates proteins. 
E) It inhibits the electron transport chain during cellular respiration.

Question 17

Which of the following cannot be photoautrophs?

Accepted Answer

A) bacteria 
B) fungi 
C) plants 
D) algae 
E) All of these choices are correct. 
A) bacteria 
B) fungi 
C) plants 
D) algae 
E) All of these choices are correct.

Question 18

The primary role of producers is to recycle nutrients in an ecosystem.

Accepted Answer

A) True 
 B)False

Question 19

When describing the horizontal zonation of a body of water, which term refers to the shoreline area?

Accepted Answer

A) littoral zone 
B) limnetic zone 
C) photic zone 
D) benthic zone 
E) estuary zone 
A) littoral zone 
B) limnetic zone 
C) photic zone 
D) benthic zone 
E) estuary zone

Question 20

Draw an energy pyramid and provide specific examples of each level.

Accepted Answer

An energy pyramid is a graphical represe

Exam 26: Environmental Microbiology

Bacteria can function in all the following roles in an ecosystem, except as a

As energy is transferred to the next trophic level, how much of it is generally lost as heat?

Which trophic level forms the base of a food chain?

Finding __________ in water is a good indication that it has been fecally contaminated.

The terrestrial realm of the biosphere is distributed into particular climatic regions called

Living or dead organisms that occupy an organism's habitat are called biotic factors.

The niche of an organism includes all of the following, except

Which of the following is a nitrifying microbe?

Which of the following water-borne pathogens are protozoans?

The main decomposers are the fungi and bacteria.

Indicator bacteria are

Most of the zooplankton and phyoplankton in a lake will be located in the

Carbon dioxide (CO2) is

Describe the carbon cycle from the atmosphere to the primary producers and back again.

The thin envelope of life that surrounds the Earth's surface is called the

How does methyl mercury affect living things?

Which of the following cannot be photoautrophs?

The primary role of producers is to recycle nutrients in an ecosystem.

When describing the horizontal zonation of a body of water, which term refers to the shoreline area?

Draw an energy pyramid and provide specific examples of each level.

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods of Studying Microorganisms

A Survey of Prokaryotic Cells and Microorganisms

A Survey of Eukaryotic Cells and Microorganisms

An Introduction to Viruses

Microbial Nutrition, Ecology, and Growth

An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering: a Revolution in Molecular Biology

Physical and Chemical Agents for Microbial Control

Drugs, Microbes, Host--The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

An Introduction to Host Defenses and Innate Immunities

Adaptive, Specific Immunity and Immunization

Disorders in Immunity

Procedures for Identifying Pathogens and Diagnosing Infections

The Gram-Positive and Gram-Negative Cocci of Medical Importance

The Gram-Positive Bacilli of Medical Importance

The Gram-Negative Bacilli of Medical Importance

Miscellaneous Bacterial Agents of Disease

The Fungi of Medical Importance

The Parasites of Medical Importance

Introduction to Viruses That Infect Humans: the Dna Viruses

The Rna Viruses That Infect Humans

Applied and Industrial Microbiology

Filters

Carbon dioxide (CO₂) is