____________ Rhythms Reflect the Adaptation of Organisms to the Many

question 23

Multiple Choice

____________ rhythms reflect the adaptation of organisms to the many changes associated with the rotation of the earth on its axis.

• A) Seasonal
• B) Circadian
• C) Infradian
• D) External

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Definitions:

Break-Even Point

An output at which a firm makes a normal profit (total revenue = total cost) but not an economic profit.

Total Revenue

The total income received by a firm from selling its goods or services, calculated as the quantity sold multiplied by the selling price per unit.

Short-Run Supply Curve

A supply curve that shows the quantity of a product a firm in a purely competitive industry will offer to sell at various prices in the short run; the portion of the firm’s short-run marginal cost curve that lies above its average-variable-cost curve.

Marginal Cost Curve

A graph that shows the relationship between the marginal cost of producing an additional unit and the quantity of that unit produced.