Final answer:
Complete conversion of a dimorphic mold to the yeast phase requires specific temperatures, typically around human body temperature, and the presence of particular nutrients in the growing environment.
Step-by-step explanation:
When changing a dimorphic mold to the yeast phase, two conditions necessary for complete conversion are temperature and nutrients. For example, the fungus Histoplasma capsulatum grows as mold at cooler temperatures around 25°C (77°F) and converts to yeast form at body temperature, 37°C (98.6°F). The presence of specific nutrients in the growing medium also influences this phase transition. These conditions are essential as they determine the growth form of the dimorphic fungi, which can be critical for their survival in different environments and for their pathogenicity.