On the one hand I commend you for wanting to learn about the role of phytoplankton in carbon fixation -- if you don't know about it, what else might you not kno

On the one hand I commend you for wanting to learn about the role of phytoplankton in carbon fixation -- if you don't know about it, what else might you not know? On the other hand I am disheartened that you confuse lignin with cellulose. It is lignin that evolved at the outset of the Carboniferous, and which fungi and co did not yet have the ability to break down.