What Was the Probable Role of Oxygen Gas in the Early

question 43

Multiple Choice

What was the probable role of oxygen gas in the early stages of life's appearance on Earth?

• A)Cellular respiration, which depends on oxygen availability, provided abundant energy to the first life-forms.
• B)Oxygen promoted the formation of complex organic molecules through physical processes.
• C)Oxygen gas tends to disrupt organic molecules, so its absence promoted the formation and stability of complex organic molecules on the early Earth.
• D)Abundant atmospheric oxygen would have created an ozone layer, which blocked out ultraviolet light and thereby protected the earliest life-forms.

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Definitions:

Total Inventory Cost

The complete cost associated with purchasing or producing inventory, including purchase price, conversion costs, and other costs.

Units Sold

The total number of a product that a company sells within a specific time period, often used to measure sales performance.

Periodic LIFO

Periodic LIFO (Last-In, First-Out) is an inventory valuation method used in accounting that assumes the most recently purchased items are sold first, and ending inventory costs are determined at the end of the accounting period.

Ending Inventory

The total value of all inventory a company has in its possession at the end of a reporting period, vital for calculating cost of goods sold.