Stable Isotope Analysis to Indicate Whether or Not Certain Elements

question 36

Multiple Choice

Stable isotope analysis to indicate whether or not certain elements have been processed by an organism is based on the observation that

• A)microbes have no preference as regards heavy versus light isotopes.
• B)microbes generally prefer using the heavier of two stable isotopes.
• C)microbes generally prefer using the lighter of two stable isotopes.
• D)None of the choices are correct.

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Definitions:

Lowest 40%

Refers to the bottom forty percent of a distribution or set of data points, often discussed in the context of income or wealth distributions.

Z > 0.59

A condition specifying that the value of the Z-score in a statistical analysis is greater than 0.59, often related to standard deviation measurements in normal distribution.

Lowest 96%

Suggests the minimal value or percentile in a dataset or series of observations, positioned at 96%.

Z < 0.97

Describes the area under the normal distribution curve to the left of Z = 0.97, including all values less than this Z-score.