29. In C4 plants, CO2 in the mesophyll cell reacts with _________ to form oxaloacetate while in the bundle sheath cell, _________ undergoes decarboxylation to pyruvate.
(A) pyruvate； aspartate
(B) phosphoenolpyruvate； oxaloacetate
(C) pyruvate； malate
(D) phosphoenolpyruvate； malate
(E) 3-phosphoglycerate； oxaloacetate
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In C4 plants, CO2 in...
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