Answer:
an organism deriving its nutritional requirements from complex organic substances. Compare with autotroph.
Step-by-step explanation:
Fungi are eucaryotes (with true nuclei in cells) chracterized with having filamentous hyphae, or having yeast forms, obtaining nutrition as decomposers. (For fugal characters, see Facts about Fungi). Mushrooms are another goup of fungi, which are mainly Basidiomycetes and partially Ascomycetes, both of which share a same feature --having a macroscopic " Fruiting-body , a Mushroom".