Question 1

Which plant(s) would likely have a mutualistic relationship with Rhizobium bacteria?

Accepted Answer

A)  potatoes
B)  beans and peas
C)  cotton
D)  wheatE) B) and D)
F) A) and B)

Question 2

The thermocline is broken down by temperature changes that allow upwelling to occur.

Accepted Answer

A) True 
 B)False

Question 3

Metagenomic analysis involves DNA sequencing of various samples taken from a particular habitat.

Accepted Answer

A) True 
 B)False

Question 4

The slowly decaying organic litter from plant and animal tissues that is found in the soil is called

Accepted Answer

A)  a biofilm.
B)  aggregate.
C)  the lithosphere.
D)  detritus.E) A) and B)
F) B) and C)

Question 5

Which of the following converts carbon dioxide to methane?

Accepted Answer

A)  Staphylococcus aureus
B)  Streptococcus pyogenes
C)  Methanococcus jannaschii
D)  Enterobius vermicularis
E)  Pseudomonas aeruginosaF) C) and E)
G) C) and D)

Question 6

You are "living off the grid",meaning that you are not using any public utilities---no water supply,no sewer connection,no natural gas or electricity.You do have a septic tank,whose pipe carries sewage out into the back yard.There is also a small pond out there that you have stocked with fish.However,you notice that the fish are floating dead in the water,and the pond seems to have a green scum on it.What has happened?

Accepted Answer

A)  Chemical toxins from your septic tank cleaner have killed the fish.
B)  There are not enough nutrients in the water,so the fish died.
C)  There is oxygen depletion in the pond due to the leakage of phosphates and other compounds from your septic tank.
D)  The fish died due to a lack of calcium,which then caused the algae to overgrow.E) C) and D)
F) A) and B)

Question 7

Where is the majority of Earth's water found?

Accepted Answer

A)  freshwater lakes
B)  icecaps and glaciers
C)  ground water
D)  oceans
E)  soil moistureF) A) and E)
G) A) and D)

Question 8

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

Question 9

Which of the following is not true of biogeochemical cycles?

Accepted Answer

A)  All organisms directly participate in recycling.
B)  All elements originate from a nonliving,long-term reservoir.
C)  Cycles are very simple systems between living and nonliving components.
D)  Elements cycle through biotic and abiotic environments.
E)  Recycling keeps nutrients in balance.F) B) and D)
G) C) and E)

Question 10

Which of the following genera is a nitrifying microbe?

Accepted Answer

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

Question 11

Contributions of the bacterium Thiobacillus include:

Accepted Answer

A)  production of acid.
B)  cycling of iron.
C)  nitrate conversion to nitrogen gas.
D)  all of the above.E) A) and C)
F) All of the above

Question 12

You have drained a pond that you have on your property,to then make it a deeper pond.In the process of using a machine to dig out some of the mud,you find that the mud is almost solid black and there is a terrible smell.Your prediction is that ________________ bacteria predominate in this area of the mud.

Accepted Answer

A)  nitrogen-fixing
B)  sulfur-oxidizing
C)  sulfur-reducing
D)  nitrifying
E)  denitrifyingF) B) and D)
G) B) and C)

Question 13

The energy of the sun is converted into chemical energy during

Accepted Answer

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

Question 14

The major group of organisms that fix nitrogen into ammonia and then oxidize it to nitrate are:

Accepted Answer

A)  protozoa
B)  bacteria
C)  algae
D)  fungiE) All of the above
F) A) and B)

Question 15

Most of the organic sulfur is located in:

Accepted Answer

A)  monosaccharides and carbohydrates.
B)  fatty acids and lipids.
C)  nulceotides and nucleic acids.
D)  amino acids and proteins.E) All of the above
F) B) and D)

Exam 24: Microbes and the Environment

Metagenomic analysis involves DNA sequencing of various samples taken from a particular habitat.

Correct Answer
verified

Correct Answer
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Which of the following converts carbon dioxide to methane?

Correct Answer
verified

The major group of organisms that fix nitrogen into ammonia and then oxidize it to nitrate are:

Correct Answer
verified

Most of the organic sulfur is located in:

Correct Answer
verified

The slowly decaying organic litter from plant and animal tissues that is found in the soil is called

Correct Answer
verified

Contributions of the bacterium Thiobacillus include:

Correct Answer
verified

Which plant(s) would likely have a mutualistic relationship with Rhizobium bacteria?

Correct Answer
verified

Where is the majority of Earth's water found?

Correct Answer
verified

The energy of the sun is converted into chemical energy during

Correct Answer
verified

Which of the following genera is a nitrifying microbe?

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

The thermocline is broken down by temperature changes that allow upwelling to occur.

Correct Answer
verified

Which of the following is not true of biogeochemical cycles?

Correct Answer
verified

Exam 24: Microbes and the Environment

Metagenomic analysis involves DNA sequencing of various samples taken from a particular habitat.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following converts carbon dioxide to methane?

Correct AnswerverifiedShow Answer

The major group of organisms that fix nitrogen into ammonia and then oxidize it to nitrate are:

Correct AnswerverifiedShow Answer

Most of the organic sulfur is located in:

Correct AnswerverifiedShow Answer

The slowly decaying organic litter from plant and animal tissues that is found in the soil is called

Correct AnswerverifiedShow Answer

Contributions of the bacterium Thiobacillus include:

Correct AnswerverifiedShow Answer

Which plant(s) would likely have a mutualistic relationship with Rhizobium bacteria?

Correct AnswerverifiedShow Answer

Where is the majority of Earth's water found?

Correct AnswerverifiedShow Answer

The energy of the sun is converted into chemical energy during

Correct AnswerverifiedShow Answer

Which of the following genera is a nitrifying microbe?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The thermocline is broken down by temperature changes that allow upwelling to occur.

Correct AnswerverifiedShow Answer

Which of the following is not true of biogeochemical cycles?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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