The Accumulation of Free Oxygen in the Atmosphere

question 29

Multiple Choice

The accumulation of free oxygen in the atmosphere

• A) was a result of the accumulation of a by-product of a type of photosynthesis.
• B) prevented the further spontaneous generation of life.
• C) provided the opportunity to extract more energy through aerobic respiration.
• D) did not occur immediately after the earth was formed.
• E) did all of these.

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Definitions:

Direct Labour

The work of factory employees that can be directly associated with producing specific goods or services.

Variable Manufacturing Overhead

Indirect manufacturing costs that vary with the level of production, such as utilities for the production area.

Fixed Manufacturing Overhead

Expenses that do not vary with the level of production, such as rent, salaries, and depreciation of manufacturing facilities.

Variable Distribution Costs

Expenses related to the delivery or distribution of a product that vary in proportion to the volume of units sold.