Answer:
The mold was not visible to the naked eye
Step-by-step explanation:
The mold is a known fungal growth on materials that are decaying and for that activity to take place, they require certain degree of moisture, temperature and food.
When the favorable conductions are met, the germination of the mold would happen around 1 – 4 days and for one to start seeing the mold, it would be around day 3. This is when the spores are seen to have risen above the surface of the substrate.