Which Statement About the Atmosphere and Life on Earth Is

question 52

Multiple Choice

Which statement about the atmosphere and life on Earth is correct?

• A)Life on Earth arose once oxygen was present.
• B)Life on Earth arose once temperatures of gases warmed.
• C)Life on Earth arose before oxygen was present.
• D)Life on Earth arose once the products of photosynthesis such as oxygen were present.

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Definitions:

Externality

A side effect or consequence of an industrial or commercial activity that affects other parties without this being reflected in the cost of the goods or services involved.

Efficient Level

The point at which resources are utilized in the most productive way, maximizing output or satisfaction without wasting any resources.

Price Charged

The amount of money demanded by a seller for a product or service.

Perfectly Competitive

A market structure characterized by many buyers and sellers, homogenous products, and free entry and exit, leading to efficient pricing and output levels.