Which Statement About the Proteobacteria Is False

question 259

Multiple Choice

Which statement about the proteobacteria is false?

• A)All groups of proteobacteria have retained the photoautotrophic nutritional mode.
• B)The proteobacteria include some nitrogen-fixing genera.
• C) Proteobacteria include many species of Gram-negative photoautotrophs that use light-driven reactions to metabolize sulfur.
• D) Proteobacteria cause major human diseases, including cholera and bubonic plague.
• E) The eukaryotic mitochondrion was derived from a proteobacterium.

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Definitions:

Marginal Output

The increase in output resulting from a one-unit increase in the level of input, while holding other inputs constant.

Variable Cost

Expenses that change in proportion to the activity or production level of a business; for example, costs for raw materials that increase as more goods are produced.

Rent

A payment made periodically by a tenant to a landlord in exchange for the use of land, a building, or another property.

Fixed Costs

Costs that do not change with the level of output in the short term, such as rent, salaries, and insurance.