Use the Graph to Answer the Following Question

question 17

Multiple Choice

Use the graph to answer the following question. Which of the following is the best conclusion about the effect of a keystone species, based on the graphed data?

• A) A keystone species has little interaction with other species in an environment.
• B) Removing a keystone species from the community drastically reduces species richness.
• C) Adding a keystone species to the community will make it more diverse.
• D) Removing a keystone species from the community will eventually allow for the invasion of a new species.

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Definitions:

Cost

The value of money that has been used up to produce something or deliver a service, and hence is not available for use anymore.

Composite Units

A measurement or costing method that combines different elements or articles to determine a standard unit rate or cost.

Sales Mix

The proportion of different products or services that a company sells, reflecting the variety and quantities sold.

Fixed Costs

Expenses that do not change in proportion to the level of activity or production, such as rent, salaries, and insurance premiums.