Question 1

The main decomposers are the fungi and bacteria.

Accepted Answer

A) True 
 B)False

Question 2

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 3

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

Question 4

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

Question 5

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) A) and B)
G) A) and C)

Question 6

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 consumersF) C) and D)
G) A) and C) D

Question 7

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 8

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

Accepted Answer

A) True 
 B)False

Question 9

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%F) B) and E)
G) A) and B) E

Question 10

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

Question 11

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 zoneF) B) and C)
G) A) and E)

Question 12

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

Question 13

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

Question 14

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

Question 15

Which of the following water-borne pathogens are protozoans?

Accepted Answer

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

Question 16

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

Question 17

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

Accepted Answer

An energy pyramid is a graphical represe...

Question 18

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 C)
G) A) and B)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Which of the following cannot be photoautrophs?

Accepted Answer

A)  bacteria
B)  fungi
C)  plants
D)  algae
E)  All of these choices are correct.F) A) and B)
G) None of the above

Exam 26: Environmental Microbiology

The main decomposers are the fungi and bacteria.

Correct AnswerverifiedShow Answer

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

Correct AnswerAnswered by ExamLex AIThe carbon cycle is the process by which...View AnswerShow Answer

Which of the following is a nitrifying microbe?

Correct AnswerverifiedShow Answer

Carbon dioxide (CO2) is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which trophic level forms the base of a food chain?

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

Indicator bacteria are

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

Which of the following water-borne pathogens are protozoans?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

How does methyl mercury affect living things?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following cannot be photoautrophs?

Correct AnswerverifiedShow Answer

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The carbon cycle is the process by which...
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Carbon dioxide (CO₂) is

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D

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E

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E

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An energy pyramid is a graphical represe...
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