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    Biology of Microorganisms
  4. Exam
    Exam 15: Functional Diversity of Microorganisms
  5. Question
    The Phylogenetic Trees of the NifH and SSU RRNA Genes
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The Phylogenetic Trees of the NifH and SSU RRNA Genes

Question 3

Question 3

Multiple Choice

The phylogenetic trees of the nifH and SSU rRNA genes of nitrogen-fixing bacteria are incongruent because


A) nitrogenase is an anaerobic enzyme.
B) this is a characteristic of all enzyme genes.
C) of horizontal gene transfer.
D) very few microbes have the nifH gene.

Correct Answer:

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