You Are Growing C₃ and C₄ Plants in Normal (21%)

question 168

Multiple Choice

You are growing C₃ and C₄ plants in normal (21%) and low (1%) O₂ air, under both warm, well-lit conditions and cool, shady conditions. You find that, in general, the C₃ plants have a photosynthetic advantage over C₄ plants in:

• A)warm high light at 1% O₂ and cool shade at 21% O₂ only.
• B)cool shade under 21% and 1% O₂, and in warm high light at 1% O_2.
• C)cool shade at 21% O₂ and warm high light at 21% O_2.
• D)warm high light at 21% O₂ and 1% O₂, and cool shade at 21% O_2.

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