What would be the expected effect on plants if the atmospheric CO₂ concentration was doubled? a. All plants would have faster growth rates. b. C₃ plants would have faster growth rates; C₄ plants would be minimally affected. c. C₄ plants would have faster growth rates; C₃ plants would be minimally affected. d. C₃ plants would have faster growth rates; C₄ plants would have slower growth rates.

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23-08-2022
Biology

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What would be the expected effect on plants if the atmospheric CO₂ concentration was doubled? a. All plants would have faster growth rates. b. C₃ plants would have faster growth rates; C₄ plants would be minimally affected. c. C₄ plants would have faster growth rates; C₃ plants would be minimally affected. d. C₃ plants would have faster growth rates; C₄ plants would have slower growth rates.

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AnnuG AnnuG · Answer 1 · 2022-09-02T05:18:51-04:00

When the atmospheric CO₂ concentration was doubled, C₃ plants would have faster growth rates; C₄ plants would be minimally affected.

C₃ plants follow the Calvin cycle or C₃ cycle. In C₃ cycle, RuBP is the first acceptor of carbon. In the presence of more atmospheric CO₂, the photosynthetic ability of the plants increases and therefore their growth increases rapidly.

C₄ plants follow C₄ cycle. The initial carbon acceptor of the cycle is PEP. Since the Calvin cycle of C₄ plants is not in direct contact with the atmospheric CO₂, therefore elevated atmospheric CO₂ concentration does not affect the plant much.

To know more about C₃ plants and C₄ plants, here

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