Course

Microbiology

Study Pack

Set 22 Microbes In Global Elemental Cycles

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Question 1

(Multiple Choice)

Free
Aeration of an environment containing microbes actively producing methane will

A) increase methane release.
B) decrease methane release.
C) not affect methane release.
D) increase nitrous oxide release.
E) increase dinitrogen release.

Answer

Question 2

(Multiple Choice)

Free
Corrosion of cement in the sewer pipe shown below is caused by Corrosion of cement in the sewer pipe shown below is caused by   A) H2S. B) H2S + O2. C) H2+ SO4<sup>2-</sup>. D) Ca(OH)2+ H2SO4. E) sewage liquid.

A) H2S.
B) H2S + O2.
C) H2 + SO42-.
D) Ca(OH)2 + H2SO4.
E) sewage liquid.

Answer

Question 3

(Multiple Choice)

Free
Marine dead zones are characterized as being

A) hypoxic.
B) aerated.
C) devoid of nitrogen fixation.
D) dangerous for ship sail.
E) usually naturally occurring.

Answer