MacArthur Observed That Five Species of Similar Warblers Coexisted on Spruce

question 45

Multiple Choice

MacArthur observed that five species of similar warblers coexisted on spruce trees,in feeding guilds,because they

• A)ate different kinds of insects.
• B)were kept below their carrying capacities by predators.
• C)foraged in different places on the tree.
• D)cooperated in their foraging habits.

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Definitions:

Industry Concentration

The extent to which a small number of firms dominate the total sales, production, or capacity of an industry.

Economies of Scale

Operational scale brings about cost reductions for firms, with each unit's production cost decreasing as the operation's scale enlarges.

Economies of Scale

The cost advantage that arises with increased output of a product, as fixed costs are spread over more units of production.

Price Competition

A market situation where sellers compete primarily on the price of their goods or services, often leading to lower prices for consumers.