If atmospheric CO₂ concentrations increase twofold or more, how will plants be affected, disregarding any changes in climate?
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.

Question

Quizplus · Accepted Answer

C₃ plants will benefit more from increased CO₂ levels because their photosynthesis efficiency is more CO₂ limited compared to C₄ plants, which already utilize CO₂ more efficiently.

If Atmospheric CO₂ Concentrations Increase Twofold or More, How Will