Question 1

Biological nitrogen fixation is carried out

Accepted Answer

A)  by prokaryotes and some protists.
B)  only by prokaryotes in symbiotic relationships with plants.
C)  only in totally anaerobic environments.
D)  only by a limited number of prokaryotes.E) None of the above
F) A) and B) D

Question 2

Peat bogs occur in flooded areas because the rate of decomposition of which compound will be slower under anaerobic conditions?

Accepted Answer

A)  starch
B)  lignin
C)  protein
D)  lipidsE) A) and C)
F) None of the above

Question 3

Ferroplasma acidarmanus is

Accepted Answer

A)  capable of oxidizing iron.
B)  capable of growth at pH 0.
C)  lacking a cell wall.
D)  all of the choicesE) None of the above
F) B) and C)

Question 4

Bacterioplankton (floating bacteria)use ________________ as a sulfur source for protein synthesis.

Accepted Answer

dimethylsu...

Question 5

The oxidized form of inorganic iron that results from microbial oxidative processes is

Accepted Answer

A)  ferrous ion.
B)  ferric ion.
C)  sulfate ion.
D)  nitrate ion.E) A) and D)
F) A) and B)

Question 6

Some microbes convert iron to magnetite which is then used as an internal compass to help position the microbe correctly in its environment.

Accepted Answer

A) True 
 B)False

Question 7

The removal of nutrients from nutrient cycling when those nutrients are converted to biomass is referred to as nutrient _____________________.

Accepted Answer

The answer of The removal of nutrients from nutrient cycling...

Question 8

Nutrients are often transformed and cycled by oxidation-reduction reactions that can change the chemical and physical characteristics of the nutrients.

Accepted Answer

A) True 
 B)False

Question 9

When a usable organic electron donor is present,sulfate serves as a terminal electron acceptor during anaerobic respiration by a variety of microbes

Accepted Answer

A)  Desulfovibrio.
B)  Desulfonema.
C)  Archaeoglobus.
D)  all of the choices.E) B) and D)
F) None of the above

Question 10

The use of sulfate as a terminal electron acceptor by Desulfovibrio is an example of assimilatory sulfate reduction.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following does not contribute to the increasing levels of methane in the atmosphere?

Accepted Answer

A)  Methane production in termites.
B)  Methane production in rice paddies.
C)  Methane production at sewage treatment plants.
D)  Methane production beneath an aerobic water column.E) C) and D)
F) All of the above

Question 12

The process of denitrification involves the transformation of

Accepted Answer

A)  ammonia to organic matter nitrogen.
B)  nitrogen gas to ammonia.
C)  nitrate to nitrogen gas.
D)  ammonia to nitrate.E) A) and C)
F) B) and C)

Question 13

The process of nitrogen fixation involves the transformation of

Accepted Answer

A)  ammonia to organic matter nitrogen.
B)  nitrogen gas to ammonia.
C)  nitrate to nitrogen gas.
D)  ammonia to nitrate.E) A) and B)
F) A) and C) B

Question 14

Methane is usually released directly to the atmosphere in environments without an overlying ________ water zone.

Accepted Answer

The answer of Methane is usually released directly to the...

Question 15

Which of the following is not an example of symbiotic nitrogen fixation?

Accepted Answer

A)  Rhizobium with leguminous plants.
B)  Azotobacter with certain photosynthetic protists.
C)  Anabaenea with a water fern.
D)  Frankia with woody shrubs.E) A) and B)
F) A) and C)

Question 16

Biomagnification involves compounds having higher relative concentrations in

Accepted Answer

A)  lower trophic levels.
B)  higher trophic levels.
C)  top consumers.
D)  top consumers or higher trophic levels.E) A) and D)
F) B) and C)

Question 17

A major fully reduced form of carbon,important in biogeochemical cycling is

Accepted Answer

A)  carbon dioxide.
B)  carbohydrate.
C)  methane.
D)  hydrogen sulfide.E) A) and D)
F) B) and C)

Question 18

A single outbreak of a tropical infectious disease in a temperate climate is considered evidence of the effects of global climate change on infectious disease epidemiology.

Accepted Answer

A) True 
 B)False

Question 19

Less than ________ percent of all microbial species have been cultured,identified,and studied.

Accepted Answer

A)  one
B)  two
C)  five
D)  tenE) A) and B)
F) None of the above

Question 20

Nitrogen fixation is an energy-yielding process.

Accepted Answer

A) True 
 B)False  False

Exam 28: Biogeochemical Cycling and Global Climate Change

Biological nitrogen fixation is carried out

Correct AnswerverifiedD

Peat bogs occur in flooded areas because the rate of decomposition of which compound will be slower under anaerobic conditions?

Correct AnswerverifiedShow Answer

Ferroplasma acidarmanus is

Correct AnswerverifiedShow Answer

Bacterioplankton (floating bacteria)use ________________ as a sulfur source for protein synthesis.

Correct Answerverifieddimethylsu...View AnswerShow Answer

The oxidized form of inorganic iron that results from microbial oxidative processes is

Correct AnswerverifiedShow Answer

Some microbes convert iron to magnetite which is then used as an internal compass to help position the microbe correctly in its environment.

Correct AnswerverifiedShow Answer

The removal of nutrients from nutrient cycling when those nutrients are converted to biomass is referred to as nutrient _____________________.

Correct AnswerverifiedShow Answer

Nutrients are often transformed and cycled by oxidation-reduction reactions that can change the chemical and physical characteristics of the nutrients.

Correct AnswerverifiedShow Answer

When a usable organic electron donor is present,sulfate serves as a terminal electron acceptor during anaerobic respiration by a variety of microbes

Correct AnswerverifiedShow Answer

The use of sulfate as a terminal electron acceptor by Desulfovibrio is an example of assimilatory sulfate reduction.

Correct AnswerverifiedShow Answer

Which of the following does not contribute to the increasing levels of methane in the atmosphere?

Correct AnswerverifiedShow Answer

The process of denitrification involves the transformation of

Correct AnswerverifiedShow Answer

The process of nitrogen fixation involves the transformation of

Correct AnswerverifiedB

Methane is usually released directly to the atmosphere in environments without an overlying ________ water zone.

Correct AnswerverifiedShow Answer

Which of the following is not an example of symbiotic nitrogen fixation?

Correct AnswerverifiedShow Answer

Biomagnification involves compounds having higher relative concentrations in

Correct AnswerverifiedShow Answer

A major fully reduced form of carbon,important in biogeochemical cycling is

Correct AnswerverifiedShow Answer

A single outbreak of a tropical infectious disease in a temperate climate is considered evidence of the effects of global climate change on infectious disease epidemiology.

Correct AnswerverifiedShow Answer

Less than ________ percent of all microbial species have been cultured,identified,and studied.

Correct AnswerverifiedShow Answer

Nitrogen fixation is an energy-yielding process.

Correct AnswerverifiedFalse

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
dimethylsu...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
False