Question 1

The Gaia Theory says that

Accepted Answer

A) the biosphere contains a diversity of habitats and niches favorable to life because living things have made it that way. 
B) the complementary actions of respiration and photosynthesis have maintained a relatively stable atmospheric pool of carbon dioxide and oxygen. 
C) all living things must obtain nutrients and energy from their environment. 
D) all elements have their origin in a nonliving, long-term reservoir. 
E) ecosystems are open with regard to energy because the sun is constantly renewing them with a renewable source. 
A) the biosphere contains a diversity of habitats and niches favorable to life because living things have made it that way. 
B) the complementary actions of respiration and photosynthesis have maintained a relatively stable atmospheric pool of carbon dioxide and oxygen. 
C) all living things must obtain nutrients and energy from their environment. 
D) all elements have their origin in a nonliving, long-term reservoir. 
E) ecosystems are open with regard to energy because the sun is constantly renewing them with a renewable source.

Question 2

Which of the following is incorrect about water?

Accepted Answer

A) When a water quality test is negative for coliforms, it is considered fit for human consumption. 
B) There is no acceptable level for fecal coliforms, enterococci, viruses, or pathogenic protozoans in drinking water. 
C) The (most probable number) MPN specifically detects fecal coliforms. 
D) The membrane filter method is a widely used rapid method to test large quantities of water for quality. 
E) Finding coliforms in high numbers indicates fecal contamination of the water. 
A) When a water quality test is negative for coliforms, it is considered fit for human consumption. 
B) There is no acceptable level for fecal coliforms, enterococci, viruses, or pathogenic protozoans in drinking water. 
C) The (most probable number) MPN specifically detects fecal coliforms. 
D) The membrane filter method is a widely used rapid method to test large quantities of water for quality. 
E) Finding coliforms in high numbers indicates fecal contamination of the water.

Question 3

The overall role that a species serves in a community is its

Accepted Answer

A) niche. 
B) habitat. 
C) population. 
D) community. 
E) biome. 
A) niche. 
B) habitat. 
C) population. 
D) community. 
E) biome.

Question 4

Carbon dioxide, sulfur dioxide, methane, and nitrous oxide are believed to be _____ gases that could disrupt the temperature balance of the Earth.

Accepted Answer

The answer of Carbon dioxide, sulfur dioxide, methane, and nitrous...

Question 5

Eutrophication

Accepted Answer

A) encourages heavy surface algal blooms. 
B) can block the O2 supply to the lake. 
C) occurs when there are excess nutrients in aquatic ecosystems. 
D) causes massive die-off of fish and invertebrates. 
E) All of these choices are correct. 
A) encourages heavy surface algal blooms. 
B) can block the O2 supply to the lake. 
C) occurs when there are excess nutrients in aquatic ecosystems. 
D) causes massive die-off of fish and invertebrates. 
E) All of these choices are correct.

Question 6

Which of the following is not correct about nitrogen fixation?

Accepted Answer

A) Some nitrogen-fixing bacteria live free. 
B) Some nitrogen-fixing bacteria live in a symbiotic relationship with plants. 
C) Nitrogen fixation is an aerobic process. 
D) The primary product of nitrogen fixation is ammonium ion, NH4+. 
E) Legumes are plants that are able to fix nitrogen. 
A) Some nitrogen-fixing bacteria live free. 
B) Some nitrogen-fixing bacteria live in a symbiotic relationship with plants. 
C) Nitrogen fixation is an aerobic process. 
D) The primary product of nitrogen fixation is ammonium ion, NH4+. 
E) Legumes are plants that are able to fix nitrogen.

Question 7

A food web is generally simpler to visualize than a food chain.

Accepted Answer

A) True 
 B)False

Question 8

Life would not be possible without

Accepted Answer

A) autotrophs. 
B) primary consumers. 
C) secondary consumers. 
D) heterotrophs. 
E) chemoheterotrophs. 
A) autotrophs. 
B) primary consumers. 
C) secondary consumers. 
D) heterotrophs. 
E) chemoheterotrophs.

Question 9

What is "nitrogen fixation" and how do legumes play a role in this important cycle?

Accepted Answer

Nitrogen fixation is the process by whic

Question 10

Some bacteria, such as Desulfovibrio, are able to reduce sulfates to hydrogen sulfide as the final step in the electron transport chain.

Accepted Answer

A) True 
 B)False

Question 11

The total amount of water in the hydrologic cycle has decreased over millions of years.

Accepted Answer

A) True 
 B)False

Question 12

What was needed by the microorganisms to facilitate the speed of the bioremediation process after the Exxon Valdez oil spill?

Accepted Answer

A) more bacteria 
B) more oil 
C) more phosphate 
D) All of these choices are correct. 
A) more bacteria 
B) more oil 
C) more phosphate 
D) All of these choices are correct.

Question 13

An _____ is the term for a deep groundwater source.

Accepted Answer

The answer of An _____ is the term for a...

Question 14

The conversion of gaseous nitrogen (N2) to the ammonium ion (NH4+) occurs during

Accepted Answer

A) ammonification. 
B) nitrogen fixation. 
C) photosynthesis. 
D) nitrification. 
E) denitrification. 
A) ammonification. 
B) nitrogen fixation. 
C) photosynthesis. 
D) nitrification. 
E) denitrification.

Question 15

Which of the following is not a greenhouse gas?

Accepted Answer

A) carbon dioxide (CO2) 
B) sulfur dioxide (SO2) 
C) methane (CH4) 
D) ammonia (NH4+) 
E) All of these choices are correct. 
A) carbon dioxide (CO2) 
B) sulfur dioxide (SO2) 
C) methane (CH4) 
D) ammonia (NH4+) 
E) All of these choices are correct.

Question 16

The physical location in the environment to which an organism has adapted is called a

Accepted Answer

A) niche. 
B) habitat. 
C) population. 
D) community. 
E) biome. 
A) niche. 
B) habitat. 
C) population. 
D) community. 
E) biome.

Question 17

All of the following pertain to red tides, except

Accepted Answer

A) due to overgrowth of red and brown algae in water. 
B) due to overgrowth of toxin-producing dinoflagellates. 
C) cause paralytic shellfish poisoning. 
D) involve toxin concentrating in shellfish. 
E) humans can become ill from eating the shellfish. 
A) due to overgrowth of red and brown algae in water. 
B) due to overgrowth of toxin-producing dinoflagellates. 
C) cause paralytic shellfish poisoning. 
D) involve toxin concentrating in shellfish. 
E) humans can become ill from eating the shellfish.

Question 18

Using microbes to break down or remove toxic wastes in water and soil is called

Accepted Answer

A) decomposition. 
B) synergism. 
C) mineralization. 
D) bioremediation. 
E) recycling. 
A) decomposition. 
B) synergism. 
C) mineralization. 
D) bioremediation. 
E) recycling.

Question 19

Analysis of a water sample by a series of presumptive, confirmatory, and completed tests that help establish an estimate of coliform numbers in the water is called

Accepted Answer

A) membrane filter method. 
B) most probable number (MPN) procedure. 
C) standard plate count. 
D) coliform determination test. 
A) membrane filter method. 
B) most probable number (MPN) procedure. 
C) standard plate count. 
D) coliform determination test.

Question 20

_____ is a floating, surface microbial community that drifts with the currents and waves.

Accepted Answer

The answer of _____ is a floating, surface microbial community...

Exam 26: Environmental Microbiology

The Gaia Theory says that

Which of the following is incorrect about water?

The overall role that a species serves in a community is its

Carbon dioxide, sulfur dioxide, methane, and nitrous oxide are believed to be _____ gases that could disrupt the temperature balance of the Earth.

Eutrophication

Which of the following is not correct about nitrogen fixation?

A food web is generally simpler to visualize than a food chain.

Life would not be possible without

What is "nitrogen fixation" and how do legumes play a role in this important cycle?

Some bacteria, such as Desulfovibrio, are able to reduce sulfates to hydrogen sulfide as the final step in the electron transport chain.

The total amount of water in the hydrologic cycle has decreased over millions of years.

What was needed by the microorganisms to facilitate the speed of the bioremediation process after the Exxon Valdez oil spill?

An _____ is the term for a deep groundwater source.

The conversion of gaseous nitrogen (N2) to the ammonium ion (NH4+) occurs during

Which of the following is not a greenhouse gas?

The physical location in the environment to which an organism has adapted is called a

All of the following pertain to red tides, except

Using microbes to break down or remove toxic wastes in water and soil is called

Analysis of a water sample by a series of presumptive, confirmatory, and completed tests that help establish an estimate of coliform numbers in the water is called

_____ is a floating, surface microbial community that drifts with the currents and waves.

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

The conversion of gaseous nitrogen (N₂) to the ammonium ion (NH₄⁺) occurs during