Many harmful or infections fungi (or the spores) are not visible to the human eye while unassisted by a microscope. Sometimes they are, so there is not a definitive answer to the question as posed.
fungus
A kind of fungus.
Staphylococcus aureus is a bacteria, not a fungus.
There are fungi such as mycobiont, red fungus, and yellow fungus!
Mushrooms are a kind of fungus that people like to eat.
its not a fungus! Its called poison ivy. Why are you touching fungus...stupid.
the fruit
It is a fungus.
It is grown as yeast is a kind of fungus.
No, fungus does not have roots. It can grow on the roots of other planets. See "Mycorrhizea".
Black mold...It is a very serious fungi and may cause death if exposed to for long period of time.
Category 5 is the worst.