Compared to C3 plants, C4 plants . can continue to fix CO2 even at lower CO2 concentrations and higher oxygen concentrations
have higher rates of photorespiration
do not use rubisco for carbon fixation
make a four-carbon compound, oxaloacetate, which is then delivered to the citric acid cycle in mitochondria

that is wrong, its not thymus.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.