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

thats not even an aswer choice

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

i won't lie i don't know so go online and ask google thats what i do

what are the options? add them, then i will be glad to .