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
Gel nails and the polish stays intact on the nail for at least a couple of weeks with high shine and no cracking, peeling or chipping. The product used to create nail extensions using gel or gel nails is gel, not to be confused with acrylic nails, which are created using liquid monomer and polymer powder. All gel services are performed using some form of gel, which usually comes in pots of gel or bottles of gel polish. Gel also comes in a variety of colors. All forms of gel require curing, or hardening, under a UV (ultraviolet) light, which can be