If the photosynthetic rate of C₄ plants such as sugarcane,corn,and Bermuda grass is about two or three times that of C₃ plants-and both are substantially more productive than CAM plants-then why,over time,have C₄ plants not outcompeted and eliminated C₃ and CAM plants?

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The Answer of If the photosynthetic rate of C₄ plants such as sugarcane,corn,and Bermuda grass is about two or three times that of C₃ plants-and both are substantially more productive than CAM plants-then why,over time,have C₄ plants not outcompeted and eliminated C₃ and CAM plants?

If the Photosynthetic Rate of C4 Plants Such as Sugarcane,corn,and

If the Photosynthetic Rate of C₄ Plants Such as Sugarcane,corn,and