Indoor Air sciences CSMI Practice Exam

Which of the following best categorizes mold?

1. Parasitic

2. Saprobic

3. Autotrophic

4. Symbiotic

The correct answer is: Saprobic

Mold is best categorized as saprobic because it primarily derives its nutrients from the decomposition of organic matter. Saprobic organisms, such as molds, play a crucial role in the ecosystem by breaking down dead or decaying organic material, thus recycling nutrients back into the soil and environment. This process is vital for soil health and contributes to the ecological balance. While there are other categories, they do not accurately describe the nature of mold. For example, parasitic organisms feed on living hosts to extract nutrients, which does not align with the lifestyle of mold since it typically grows on non-living organic material. Autotrophic organisms, such as plants, produce their own food through photosynthesis, which is not applicable to mold. Symbiotic relationships involve two different organisms living closely together for mutual benefit, which is not how mold typically operates. This distinction solidifies the classification of mold as saprobic, emphasizing its role in decomposition and nutrient cycling.