In an experiment studying photosynthesis performed during the day, you provide a plant with radioactive carbon (¹4C) dioxide as a metabolic tracer. The ¹4C is incorporated first into oxaloacetate. The plant is best characterized as a
A) C4 plant.
B) C3 plant.
C) CAM plant.
D) heterotroph.
E) chemoautotroph.
Answer: A
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