The Evolution of Eukaryotic Cells Most Likely Involved

question 9

Multiple Choice

The evolution of eukaryotic cells most likely involved

• A) endosymbiosis of an aerobic bacterium in a larger host cell-the endosymbiont evolved into mitochondria.
• B) anaerobic archaea taking up residence inside a larger bacterial host cell to escape toxic oxygen-the anaerobic bacterium evolved into chloroplasts.
• C) an endosymbiotic fungal cell that evolved into the nucleus.
• D) acquisition of an endomembrane system, and subsequent evolution of mitochondria from a portion of the Golgi.

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Definitions:

Unit Volume

The quantity of items or units produced or sold.

Contribution Margin Ratio

The proportion of sales revenue that remains after variable costs are subtracted, indicating how much contributes to covering fixed costs and generating profit.

Fixed Expenses

Costs that do not fluctuate with the level of production or sales, such as rent, insurance, and property taxes.

Contribution Margin Ratio

A ratio that represents the percentage of sales revenue that exceeds variable costs, indicating how much revenue contributes towards covering fixed costs and generating profit.