In Light, Purple Sulfur Bacteria Use H₂S as an Electron

question 88

Multiple Choice

In light, purple sulfur bacteria use H₂S as an electron donor and release pure sulfur as a waste product. They are examples of

• A) photoautotrophs.
• B) photoheterotrophs.
• C) chemolithotrophs.
• D) chemoheterotrophs.
• E) deep-sea, volcanic vent bacteria.

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Definitions:

F-distributions

A continuous probability distribution that arises in the testing of whether two population variances are equal.

Standard Normal Distribution

A statistical distribution with a mean of 0 and a standard deviation of 1, where data fits a specific pattern that is symmetrical around the mean.

Chi-squared Distribution

A probability distribution that arises in statistics when estimating how closely an observed distribution matches an expected distribution.

Interval Data

A type of data measurement where the order of the data points is meaningful and the difference between data points is consistent and measurable.