The First Cells Appeared on Earth About __________ Years After

question 51

Multiple Choice

The first cells appeared on Earth about __________ years after its crust solidified.

• A)1 billion
• B)200 million
• C)3.8 billion
• D)4.5 billion
• E)a few

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Definitions:

Price

The expected price in currency, required, or given for a good or service.

Utility Function

A utility function is a mathematical representation of how different goods or bundles of goods satisfy a consumer's needs and preferences.

Cow Feed

A type of feed specifically formulated for the dietary needs of cows, often including grains, hay, and other nutritional components.

Hay

Dried grass, often used as fodder for livestock.