Why Might Rubisco Have Evolved with an Inability to Distinguish

question 25

Multiple Choice

Why might Rubisco have evolved with an inability to distinguish between CO₂ and O₂?

• A)Rubisco may have evolved at a time when atmospheric O₂ levels were virtually nonexistent.
• B)Rubisco may have evolved at a time when atmospheric CO₂ levels were virtually nonexistent.
• C)Rubisco evolved when atmospheric O₂ levels were high.
• D)Rubisco possesses four subunits.
• E)Rubisco denatures due to photorespiration.

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