Scientists Reported That the Reintroduction of Wolves into Yellowstone National

question 30

Multiple Choice

Scientists reported that the reintroduction of wolves into Yellowstone National Park initiated a trophic cascade.Which factual statement best supports this conclusion?

• A) Wolves prey on a number of species, but they prefer elk.
• B) Mountain lions and coyotes, as well as wolves, prey on elk.
• C) After wolves were reintroduced, the numbers of mountain lions remained constant.
• D) After wolves were reintroduced, the numbers of aspen trees increased.
• E) After wolves were reintroduced, the numbers of elk declined.

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Definitions:

Total Contribution Margin

The difference between total sales revenue and total variable costs.

Variable Costing

A pricing approach that incorporates just the variable production expenses, such as direct materials, direct labor, and variable manufacturing overhead, into the costs of products.

Unit Product Cost

The total cost to produce a single unit, including direct materials, direct labor, and allocated overhead.

Variable Costing

An accounting approach that includes only variable costs—direct materials, direct labor, and variable manufacturing overhead—in product costs, excluding fixed manufacturing overhead.