The Phylogenetic Trees of the NifH and SSU RRNA Genes

question 23

Multiple Choice

The phylogenetic trees of the nifH and SSU rRNA genes are incongruent because

• A) nitrogenase is an anaerobic enzyme.
• B) nitrogenase evolves rapidly.
• C) of horizontal gene transfer.
• D) very few microbes have the nifH gene.

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Definitions:

Straight-Line Method

A depreciation technique that allocates an equal amount of the asset's cost to each year of its useful life.

Semiannually

Occurring twice a year; a term often used to describe the payment schedule of interest or dividends.

Amortization of Discount

The gradual reduction of a bond discount over its life, affecting the issuer's interest expense and balance sheet.