Over Time, What Would We Expect in the Evolution of C₃

question 31

Multiple Choice

Over time, what would we expect in the evolution of C₃, C₄, and CAM strategies?

• A) As the most complicated plants, CAM plants are most likely to go extinct.
• B) As the probable ancestral form of photosynthesis, C₃ plants are primitive and most likely to go extinct.
• C) Because CAM plants make better usage of metabolism during the night, they are superior and will eventually become the dominant plants.
• D) Because CO₂ is delivered by the bundle sheath cells in C₄ plants, they are superior and will eventually dominate.
• E) Each form of photosynthesis has advantages in a heterogeneous world and, as long as environmental conditions vary, all forms will have an adaptive advantage in their unique niche.

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