Molds, or mould, are various fungi that cover surfaces as fluffy mycelia and usually produce masses of asexual, or sometimes sexual, spores.
Mold is a growth of minute fungi forming on vegetable or animal matter, commonly as a downy or furry coating and associated with decay or dampness.
There are thousands of known varieties of molds.
By decomposing organic matter, molds play a big part in material biodegradation, enabling decay and rot necessary in all ecosystems.
The enzymes and mycotoxins can also inhibit the growth of other molds and microorganisms.
Some mycotoxins are considered to be harmful to health.