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:

Interval Estimate

Interval Estimate refers to a range of values, derived from sample statistics, used to estimate a population parameter.

Standard Error

Measures the accuracy with which a sample represents a population, showing the dispersion of sample means around the true population mean.

Test Statistic

A standardized value derived from sample data during a hypothesis test that is used to determine the p-value or to compare against the critical value.

Population Means

The average value of a set of characteristics or figures for the entire population.