Hydrogen sulfide occurs in ponds as a result of _______ by bacteria in mud.
a. anaerobic decomposition
b. aerobic respiration
c. aeration
d. ammonification
Answer: a. anaerobic decomposition
Hydrogen sulfide occurs in ponds as a result of _______ by bacteria in mud.
a. anaerobic decomposition
b. aerobic respiration
c. aeration
d. ammonification
Answer: a. anaerobic decomposition
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