Question 1

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 2

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.F) None of the above
G) A) and D)

Question 3

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

Accepted Answer

An energy pyramid is a graphical represe...

Question 4

The conversion of nitrate (NO3-)  to nitrogen gas (N2)  is called

Accepted Answer

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

Question 5

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 6

Life would not be possible without

Accepted Answer

A)  autotrophs
B)  primary consumers
C)  secondary consumers
D)  heterotrophs
E)  chemoheterotrophsF) A) and E)
G) A) and B)

Question 7

Differentiate between the following terms and provide an example for each: mutualism, communalism, synergism, parasitism.

Accepted Answer

Mutualism is a type of symbiotic relatio...

Question 8

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 are green house gasses.F) A) and B)
G) B) and C)

Question 9

All of the following are abiotic factors, except

Accepted Answer

A)  atmospheric gases.
B)  an animal carcass.
C)  minerals.
D)  water.
E)  light.F) A) and C)
G) C) and D)

Question 10

A group of organisms of the same species within a community is called a

Accepted Answer

A)  niche.
B)  habitat.
C)  population.
D)  community.
E)  biome.F) All of the above
G) B) and D)

Question 11

Which of the following water-borne pathogens are protozoans?

Accepted Answer

A)  Vibrio
B)  Hepatitis A
C)  Giardia
D)  Shigella
E)  Norwalk virusF) B) and D)
G) B) and E)

Question 12

Which organism is a nitrogen fixing symbiont of legumes?

Accepted Answer

A)  Rhizobium
B)  Nitrobacter
C)  Pseudomonas
D)  Nostoc
E)  AzotobacterF) D) and E)
G) None of the above

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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.F) A) and B)
G) B) and D)

Question 15

With the Exxon Valdez oil spill, what was needed by the microorganisms to facilitate the speed of the bioremediation process?

Accepted Answer

A)  more bacteria
B)  more oil
C)  more phosphate
D)  all of theseE) A) and B)
F) A) and C)

Question 16

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 17

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.F) A) and D)
G) All of the above

Question 18

An _____ is a region where the river meets the sea.

Accepted Answer

The answer of An _____ is a region where the...

Question 19

A ___________ is a form of consumer that actively seeks out and ingests live prey.

Accepted Answer

The answer of A ___________ is a form of consumer...

Question 20

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.F) B) and D)
G) A) and C)

Exam 26: Environmental Microbiology

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

Correct AnswerAnswered by ExamLex AIAn energy pyramid is a graphical represe...View AnswerShow Answer

Which organism is a nitrogen fixing symbiont of legumes?

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Differentiate between the following terms and provide an example for each: mutualism, communalism, synergism, parasitism.

Correct AnswerAnswered by ExamLex AIMutualism is a type of symbiotic relatio...View AnswerShow Answer

Which of the following water-borne pathogens are protozoans?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A group of organisms of the same species within a community is called a

Correct AnswerverifiedShow Answer

The Gaia Theory says that

Correct AnswerverifiedShow Answer

The conversion of nitrate (NO3-) to nitrogen gas (N2) is called

Correct AnswerverifiedShow Answer

With the Exxon Valdez oil spill, what was needed by the microorganisms to facilitate the speed of the bioremediation process?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

All of the following pertain to red tides, except

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerAnswered by ExamLex AINitrogen fixation is the process by whic...View AnswerShow Answer

All of the following are abiotic factors, except

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Which of the following is not a greenhouse gas?

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An _____ is a region where the river meets the sea.

Correct AnswerverifiedShow Answer

How does methyl mercury affect living things?

Correct AnswerverifiedShow Answer

Life would not be possible without

Correct AnswerverifiedShow Answer

A ___________ is a form of consumer that actively seeks out and ingests live prey.

Correct AnswerverifiedShow Answer

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An energy pyramid is a graphical represe...
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Mutualism is a type of symbiotic relatio...
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The conversion of nitrate (NO₃^-) to nitrogen gas (N₂) is called

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Nitrogen fixation is the process by whic...
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