Analysis of the Small Subunit RRNAs from All Organisms in the Three

question 18

Multiple Choice

Analysis of the small subunit rRNAs from all organisms in the three current domains suggests that

• A)the eukaryotes arose from prokaryotes.
• B)the Archaea are more closely related to eukaryotes than prokaryotes.
• C)all modern and extinct organisms on earth arose from a common ancestor.
• D)the prokarytoes,Archaea,and eukaryotes are not related. Refer to "Systems of Presenting a Universal Tree of Life" for a discussion of the ssu rRNAs and their role in taxonomy.

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Definitions:

Binomial Probability

The probability of obtaining a fixed number of successful outcomes in a fixed number of trials, each with the same probability of success.

Logistic Regression

A statistical method for analyzing a dataset in which there are one or more independent variables that determine an outcome. The outcome is measured with a dichotomous variable (where there are only two possible outcomes).

Lactic Acid

An organic compound produced in muscles during intense activity and fermented foods, responsible for the sour taste.

Confidence Interval

A statistical measure expressed as an interval, calculated from sample data, indicating where the true population parameter is expected to lie with a specific degree of certainty.