What Result(s) from the Park Grass Experiment Support the Idea

question 8

Multiple Choice

What result(s) from the Park Grass Experiment support the idea of community stability? (Select all that apply.)

• A) Virtually no new species have been added to the plant community since 1862.
• B) The proportions of three plant groups (legumes, grasses, and other species) remained fairly stable over the interval of the study.
• C) The proportion of grasses, legumes, and other plants in the study plots varied from year to year, mainly in response to variation in precipitation.
• D) The application of fertilizer produced significantly different proportions of grasses, legumes, and other plant species.

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Definitions:

Average Total Cost

The average cost per unit of output, calculated by dividing the total cost by the quantity of output produced.

Perfect Competition

A market structure characterized by a large number of small firms, a homogeneous product, perfect information, and free entry and exit, leading to price-taking behavior.

Long-Run Equilibrium

A state in which all firms in a market are earning normal profits, and there is no incentive for firms to enter or exit the market.

Marginal Cost

Marginal cost is the additional cost incurred by producing one additional unit of a good or service.