Lichens Are Older Than Plants

question 61

Multiple Choice

Lichens are older than plants. Is it possible that lichens were an important component in aiding the colonization of land by plants?

• A)Yes; lichens could have floated in oceans and accidentally been washed up on land.
• B)Yes; lichens could have modified the rocks and soil in a similar way that they do today when they colonize areas disturbed by volcanic explosions and fires.
• C)No, because fungus and algae colonized land at different times.
• D)No, because the fungus component of lichens is not as old as algae.
• E)More experiments need to be done before we are sure.

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Definitions:

Market Price

The ongoing value at which an item or service is available for buy or sale within a market context.

Economic Welfare

The overall well-being and standard of living of people in an economy, often measured in terms of income, health, and education.

Social Planner

A theoretical decision-maker who aims to achieve the best possible outcomes for a society, considering all available information and societal preferences.

Producer Surplus

The difference between what producers are willing to sell a good for and the price they actually receive, signifying the benefit to producers from trade.