The Fact That Most Birds and Mammals Sleep Even If

question 130

Multiple Choice

The fact that most birds and mammals sleep even if it puts them at risk suggests that

• A) sleep serves an important physiological function.
• B) sleep serves a cognitive function in humans.
• C) people should sleep as much as they can.
• D) all of the above
• E) both B and C

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Definitions:

Cross-Price Elasticity

A measure of how much the demand for a product changes when the price of another product changes.

Quantity Demanded

The specific amount of a good or service that consumers are willing and able to buy at a particular price.

Percentage Change

A mathematical calculation that shows how much a quantity has increased or decreased as a proportion of its previous value, usually expressed as a percentage.

Income Elasticity

A measure of how much the demand for a product changes with a change in consumers' income.