My friends have eaten them, if you stomach the thought, or they would boil them until the water was brownish and mix it with Kool-Aid or some other sweet drink to get it down. I'm not sure how much they would drink because I was always to scared to try it. But this is how I know 1st hand experience.
Button mushrooms.
if you mean f(mushrooms) then use whatever function on the variable or variable mushrooms. if you mean the function mushrooms, then i have no idea as i would assume there is no standard function mushrooms.
Yes, mushrooms, like all living things, use energy for biological functions.
Many seafood stuffed mushroom recipes call for the use of simple white mushrooms. I, however, prefer to use portobello mushrooms because I think they give my recipes a more complex flavor than the white.
they use spores
Mushrooms need warmth to grow and do well. The sun provides warmth.
Yes.
No
The structures that mushrooms use for reproduction are called spores. These spores are spread by wind, rain, animals and other natural causes.
believed they were spirits
It is believed that possibly, the Berserkers did.
As a food source.