Comprehensive coverage of Ascomycota including ascus as defining structure, asexual and sexual reproduction, homothallic vs heterothallic reproduction, ascus development, four types of ascomata (cleistothecium, perithecium, apothecium, pseudothecium), economic importance, and detailed life cycles of model organisms: Saccharomyces, Aspergillus, Penicillium, Neurospora, and Peziza.