Ascomycota of their hosts. Owing to their long evolutionary history, the Ascomycota have evolved the capacity to break down almost every organic substance. Unlike most organisms, they are able to use their own enzymes to digest plant biopolymers such as cellulose or lignin. Collagen, an abundant structural protein in animals, and keratin—a protein that forms hair and nails—, can also serve as food sources. Unusual examples include "Aureobasidium pullulans", which feeds on wall paint, and the kerosene fungus "Amorphotheca resinae", which feeds on aircraft fuel (causing occasional problems for the airline industry), and may sometimes block fuel pipes. Other species can
Artificial nails Over time, exposure to MMA could cause lasting effects such as drowsiness, light-headedness, and trembling of the hands. Musicians who play stringed instruments may wear artificial nails as an aid in playing. Some guitarists like Don Ross, Doyle Dykes and James Taylor are known for doing so. Many intermediate and advanced classical and finger-style guitarists use varieties of fake nails to obtain a consistent, clear and bright tone with each pluck. The players of many ancient Chinese instruments, like the guqin, pipa, and ruan, also commonly used artificial nails. Even the Indian instrument sarod requires nails for tipping, so many