Which of the following may be used as sources of energy by chemolithotrophs?
A. Hydrogen gas.
B. Reduced nitrogen compounds.
C. Reduced sulfur compounds.
D. All of the choices.
Answer: D
Which of the following may be used as sources of energy by chemolithotrophs?
A. Hydrogen gas.
B. Reduced nitrogen compounds.
C. Reduced sulfur compounds.
D. All of the choices.
Answer: D