"Why would a picture of a real scene trigger different signals in her brain than the scene itself?" Because the paint/ink/leds/whatever that're used may be different from the real thing for her, but perfectly on-spot in the eyes of the photo company.
I doubt extra colors would do a person much good. Your brain wouldn't know how to handle it and you couldn't describe normal colors anymore... And you couldn't sleep because of all that infrared from your eyelids. Maybe it would work with babies growing up with it. And think of the goths wearing all kinds of colorful black! Cop: "Sir, you ignored an octarine traffic light. I'll have to give you a fine for that."
"MY request more important than those others. do mine first." That one's nice! Let them decide the order in which the tickets are handled, and automatically send notifications to the owners of tickets who just got moved down the list. "Selfish co-worker X just lowered the priority of your problem"
The tree consists of carbon for a large part. That's carbon that the tree absorbed out of the atmosphere.