Bio 109 Chapter 27: Bacteria and
Archaea Exam Questions and Answers
100% Pass
Bacteria function primarily in which ecological role? - ✔✔Bacteria are common in all of
the listed ecological roles.
.Parasitism
.Mutualism
.Commensalism
.Decomposition
The Desulfovibrio bacterium breaks down organic matter (which it must have) and uses
sulfate (not oxygen) as an electron acceptor. As a result, it produces hydrogen sulfide
(H2S), accounting for the "rotten egg" smell of swamp muck. Oxygen is a deadly poison
to Desulfovibrio.
We would call Desulfovibrio a(n) __________. - ✔✔obligately anaerobic
chemoheterotroph
Which of the following is a disease caused by bacteria? - ✔✔Tuberculosis
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
Archaea Exam Questions and Answers
100% Pass
Bacteria function primarily in which ecological role? - ✔✔Bacteria are common in all of
the listed ecological roles.
.Parasitism
.Mutualism
.Commensalism
.Decomposition
The Desulfovibrio bacterium breaks down organic matter (which it must have) and uses
sulfate (not oxygen) as an electron acceptor. As a result, it produces hydrogen sulfide
(H2S), accounting for the "rotten egg" smell of swamp muck. Oxygen is a deadly poison
to Desulfovibrio.
We would call Desulfovibrio a(n) __________. - ✔✔obligately anaerobic
chemoheterotroph
Which of the following is a disease caused by bacteria? - ✔✔Tuberculosis
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
