Which of the following statements about C4 carbon fixation is not true?

C3 photosynthesis occurs in the majority of plant species, while C4 photosynthesis is found in a smaller group adapted especially to hot, bright conditions. So the statement that C4 carbon fixation occurs in more plants than C3 carbon fixation is not true. The other statements describe common features of C4 plants, including their specialization in particular leaf cells.

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