Some fungi take on different shapes, depending on their environmental conditions. These fungi are called dimorphic fungi , because they have “two forms.” For example, the fungus Histoplasma capsulatum , which causes the disease histoplasmosis, is thermally dimorphic; it has two forms that are dependent on temperature. In temperatures of about 25°C, it grows as a brownish mycelium, and looks like a mass of threads. At body temperature (37°C in humans), it grows as single, round yeast cells.
Mark had two samples of the same fungus, Histoplasma capsulatum. One sample had been grown at 25 degrees Celsius and the other at 37 degrees Celsius.
What temperature was sample that looks like single round yeast cell grown at?