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

Question

Quizplus · Accepted Answer

C3 plants have lower CO2 assimilation rates than C4 plants, and thus, the increase in CO2 concentration would have a pronounced effect on C3 photosynthesis, leading to faster growth. However, C4 plants use CO2 more efficiently to perform photosynthesis and fix carbon, and the change in CO2 concentration would have a minimal impact on their growth rates. Therefore, the expected effect would be faster growth in C3 plants and minimally affected growth in C4 plants.

What Would Be the Expected Effect on Plants If the Atmospheric