Which Scenario Is an Example of Commensalism

question 59

Multiple Choice

Which scenario is an example of commensalism?

• A) acacia trees coevolved with ant colonies that protect the tree from herbivores
• B) bacteria provide glucose to legume plants
• C) cattle egrets feed on insects flushed out from the grass by cattle
• D) plants coevolved with their pollinators
• E) tapeworms feed and reproduce in the intestines of pigs

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Definitions:

Economies of Scale

The economic benefits that businesses gain from their size of operations, where the expense per unit of production typically lowers as the scale increases.

Increasing Returns

A situation in which an increase in the scale of production results in a disproportionate increase in output, usually leading to lower average costs.

Suffer Losses

occurs when a business or individual incurs expenses that exceed their revenues.

Long-run

A period of time in economics during which all factors of production and costs are variable, allowing for full industry adjustment.