Some Gram-Negative Bacteria Branch More Deeply from the Proteobacteria Than

question 69

Multiple Choice

Some Gram-negative bacteria branch more deeply from the proteobacteria than the five Greek-lettered classes do from each other. Which phyla listed below is deep-branching Gram-negative?

• A) Thermotogo
• B) Aquifex
• C) Flavobacteria
• D) Protobacteria
• E) Chlorobi

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