Which Statement About Methanogenic Species of Euryarchaeota Is False

question 14

Multiple Choice

Which statement about methanogenic species of Euryarchaeota is false?

• A) They release approximately 2 billion tons of methane annually, which is 80 to 90 percent of the methane that enters the atmosphere.
• B) They occur in the guts of ruminants and other mammals.
• C) They contribute to the greenhouse effect.
• D) They are obligate anaerobes.
• E) They reduce nitrite ions as a key step in their energy metabolism.

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