What Would Be the Expected Effect on Plants If the Atmospheric

question 53

Multiple Choice

What would be the expected effect on plants if the atmospheric CO2 concentration was doubled?

• A) All plants will experience increased rates of photosynthesis.
• B) C3 plants will have faster growth; C4 plants will be minimally affected.
• C) C4 plants will have faster growth; C3 plants will be minimally affected.
• D) C3 plants will have faster growth; C4 plants will have slower growth.
• E) Plant growth will not be affected because atmospheric CO2 concentrations are never limiting for plant growth.

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