Refer to the Table

question 51

Multiple Choice

Refer to the table.
The table contains data on the effects of symbiosis between a fly (host) and a fungus over many years. It shows the upper and lower bounds for the effects of the association; positive numbers denote net benefits and negative numbers denote net costs. (If zero is between the upper and lower bounds, consider the effect to be zero, since it is statistically indistinguishable from zero.)
-According to the table, the relationship between the fungus and the fly in 1990 was a

• A) mutualism.
• B) competitive interaction.
• C) commensalism.
• D) host?parasite interaction.

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Definitions:

Good

An item or product that satisfies a want or need and can be transferred to others.

Consumer Surplus

The difference between what consumers are willing to pay for a good or service and what they actually pay, representing their gain from the transaction.

Market Equilibrium

A market state where the quantity demanded equals the quantity supplied, leading to no pressure on the price to either rise or fall.

Good

A material item or service that satisfies a want or need and is available for sale or trade.