Fungi includes mushrooms, yeast, and mold. Fungi are multicellular and eukaryotic. They are also heterotrophs, and gain nutrition through adsorption
Stress is not a symptom of Gingivitis.
Scientific inquiry is to think , ponder, and have an interest in investigating something that exist or you think may exist or should exist. Anyone can use it ( kind of like the scientific method) but people who commonly use it seriously is police, scientists, and other career fields who find it necessary. Scientific inquiry involves a person, research tools, space, writing pad, and one, etc.