Cancer or any number of other genetic mutations like diabetes, birth defects, etc.
Sorry I don’t know that one
They increase in number and they are more specialized
Would it be "illuminated?"
Hi! Spores are produced by sporophyte, or the spore bearing generation. Spores can be found in non seed bearing plants; like liverworts, hornworts, mosses and ferns. In ferns, you could physically find spores on the underside of the frond. These sporangia may clump together as well, to form sori. I hope this helps, let me know if you have more questions!