Under the microscope, mold reveals a intricate network of hyphae, thread-like filaments that form the mycelial structure of the fungus. The hyphae intertwine and branch, creating a weblike colony. The appearance and arrangement of these hyphae, along with other microscopic characteristics such as spore shape and morphology, aid in identifying and classifying different mold species. By studying mold under the microscope, scientists can gain insights into its biology, environmental requirements, and potential impacts on human health and the ecosystem.