Final answer:
The Phylum Ascomycota, also known as Sac Fungi, is a major group of fungi characterized by the production of an ascus. Ascomycota can be identified under a microscope by the presence of asci and ascospores. These fungi have a filamentous structure and play various roles in different ecosystems.
Step-by-step explanation:
The Phylum Ascomycota, also known as Sac Fungi, is a major group of fungi characterized by the production of a sac-like structure called an ascus. Ascomycota can be identified under a microscope by the presence of asci and ascospores. These fungi have a filamentous structure, produce conidia for asexual reproduction, and are commonly found in various habitats including soil, plants, and humans. Examples of Ascomycota include yeasts used in baking and brewing, as well as plant and animal parasites.