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)  Bacteria can function in all the roles listed.F) A) and E)
G) C) and E)

Question 2

The combustion of fossil fuels, such as coal, oil, and gas, have contributed to the steady increase in atmosphere CO2 gas over the last 25 years.

Accepted Answer

A) True 
 B)False

Question 3

Which is mismatched?

Accepted Answer

A)  parasitism - one organism benefits and the other receives no benefit
B)  competition - one organism gives off substances that inhibit or kill other organisms
C)  predator - seeks out and ingests live prey
D)  scavengers - feed on live to dead cells and wastes
E)  omnivores - feed on plants and fleshF) D) and E)
G) A) and B)

Question 4

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 the choices are correct.F) A) and B)
G) C) and E)

Question 5

Why do all living things need phosphorus?

Accepted Answer

A)  For energy.
B)  It is part of nucleic acids.
C)  It is needed for lipid synthesis.
D)  It is needed for creating the bonds that stabilize proteins.
E)  All of the above.F) C) and E)
G) D) and E)

Question 6

Discuss and give several examples of the use of microbes in bioremediation.

Accepted Answer

Bioremediation is the use of microorgani...

Question 7

An example of a primary consumer would be a

Accepted Answer

A)  dog.
B)  cow.
C)  tiger.
D)  mushroom.
E)  None of the above.F) All of the above
G) A) and D) B

Question 8

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 the above.F) A) and D)
G) D) and E)

Question 9

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 10

What is the source of CO2 released into the atmosphere?

Accepted Answer

A)  Respiration
B)  Anaerobic microbial activity
C)  Fuel combustion
D)  Volcanic activity
E)  All of the above.F) C) and D)
G) B) and C) E

Question 11

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) B) and D)
G) A) and E)

Question 12

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

Question 13

Which of the following regions includes the seashore?

Accepted Answer

A)  Littoral zone
B)  Limnetic zone
C)  Photic zone
D)  Benthic zone
E)  Estuary zoneF) All of the above
G) A) and E)

Question 14

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

Question 15

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

Accepted Answer

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

Question 16

Potable water is

Accepted Answer

A)  contaminated.
B)  polluted.
C)  safe to drink.
D)  foul testing.
E)  None of the choices are correct.F) A) and E)
G) A) and D)

Question 17

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.
E)  None of the choices are correct.F) B) and D)
G) C) and D)

Question 18

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

Question 19

Which of the following can carry out denitrification to completion?

Accepted Answer

A)  Rhizobium
B)  Nitrobacter
C)  Pseudomonas
D)  Nostoc
E)  AzotobacterF) B) and C)
G) A) and D)

Question 20

In a large body of standing water, which area exists between the hypolimnion and the epilimnion?

Accepted Answer

A)  Thermocline
B)  Photic
C)  Limnetic
D)  Littoral
E)  ProfundalF) B) and C)
G) B) and E)

Exam 26: Environmental Microbiology

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

Correct AnswerverifiedShow Answer

The combustion of fossil fuels, such as coal, oil, and gas, have contributed to the steady increase in atmosphere CO2 gas over the last 25 years.

Correct AnswerverifiedShow Answer

Which is mismatched?

Correct AnswerverifiedShow Answer

Indicator bacteria are

Correct AnswerverifiedShow Answer

Why do all living things need phosphorus?

Correct AnswerverifiedShow Answer

Discuss and give several examples of the use of microbes in bioremediation.

Correct AnswerAnswered by ExamLex AIBioremediation is the use of microorgani...View AnswerShow Answer

An example of a primary consumer would be a

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the source of CO2 released into the atmosphere?

Correct AnswerverifiedE

Which trophic level forms the base of a food chain?

Correct AnswerverifiedShow Answer

Which of the following is not correct about nitrogen fixation?

Correct AnswerverifiedShow Answer

Which of the following regions includes the seashore?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

Potable water is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is incorrect about water?

Correct AnswerverifiedShow Answer

Which of the following can carry out denitrification to completion?

Correct AnswerverifiedShow Answer

In a large body of standing water, which area exists between the hypolimnion and the epilimnion?

Correct AnswerverifiedShow Answer

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The combustion of fossil fuels, such as coal, oil, and gas, have contributed to the steady increase in atmosphere CO₂ gas over the last 25 years.

Correct Answer
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Answered by ExamLex AI
Bioremediation is the use of microorgani...
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B

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What is the source of CO₂ released into the atmosphere?

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E

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D

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