Where does CO2 used in the Calvin cycle come from?

Carbon dioxide used in the Calvin cycle comes from the atmosphere It diffuses into the leaves of the plant through the stomata and enters the intercellular air spaces. From their it diffuses through the cell walls of the mesophyll cells, through the cell membrane and through the cytoplasm, where it enters the chloroplasts The Calvin cycle takes place in the stroma (matrix) of the chloroplasts users.rcn.com/jkimball.ma.ultranet/Biolo... See: emc.maricopa.edu/faculty/farabee/BIOBK/B....

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.