Mold is a type of fungi that grows on plants and fibers which is usually associated with damp, musty areas such as in bathrooms, basements and attics. Molds are species of microscopic fungi and they grow in the form of multicellular filaments. Although there are molds that cause diseases or food spoilage, there are other molds that are useful for biodegradation or food production, beverages and even creation of antibiotics.
Molds reproduce through small spores which could contain single nucleus or could be multinucleate. And they can be asexual, which is a product of mitosis, or sexual, which is the product of meiosis. Molds may grow on dead organic matter. Some molds can begin growing at temperatures as low as 2 degrees.
If you are concerned that molds are starting to grow, it would be best to address this problem immediately. Having molds usually indicates moisture problem in your living area and it needs to be dealt with immediately. Aside from it being an unpleasant sight, molds can also produce health hazards. Molds are allergens and irritants. For someone who suffers from asthma this could pose breathing trouble and could also irritate the nose, ears and eyes.
Getting rid of molds would mean eliminating the source of moisture. You need to find out where and how moisture seeps in to your homes or your buildings. Moisture problems can be dealt by the home owners if the area is not so large. But for bigger area, you might need to have a professional deal with this mater on a more regular basis.