What characteristic of molds can affect their identification?

The color of colonies is an important characteristic in the identification of molds because it can reveal specific species or groups of fungi. Different molds produce colonies with unique colors and appearances as they grow on culture media. For example, certain molds may have characteristic colors that aid in distinguishing them from others during observation. The color can indicate not only the species but also its growth stage and environmental conditions.

While the size of spores, presence of mycotoxins, and location of growth can provide useful information, they are not as immediately indicative of mold species as the visible coloration of the colonies. The appearance of mold colonies can provide insight into their identity at a glance, making it a critical characteristic in mycological studies.