Based on the Fact That CO₂ Is Often Limiting for Photosynthesis,what

question 57

Multiple Choice

Based on the fact that CO₂ is often limiting for photosynthesis,what might you conclude about the evolution of photosynthesis?

• A)Photosynthesis evolved when environmental concentrations of CO₂ were low.
• B)Photosynthesis evolved when environmental concentrations of CO₂ were high.
• C)CO₂ levels likely did not have a bearing on the evolution of photosynthesis.
• D)Photosynthesis evolved in a greenhouse.

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Definitions:

Recession

A period of temporary economic decline during which trade and industrial activity are reduced, generally identified by a fall in GDP in two successive quarters.

Deflation

A sustained decrease in the price level.

Growth

An increase in the economic capacity of a country to produce goods and services, compared from one period of time to another.

Stock Variable

A quantity measured at one specific time, contrasting with flow variables, which are measured over a period of time.