Question

When you keep food items like bread and fruits outside for a long time especially during the rainy season, you will observe a cottony growth on them.
(a)What is this growth called?
(b)How does the growth take place?

Answer 1

(a)When food items like bread and fruits are kept outside for a long time, especially during the rainy season, a cottony growth of bread mold (a fungus) is observed.
(b)The growth of fungus takes place by spores suspended in the air, which when coming in contact with moisture on bread germinate and grows to produce new cells.

The growth of fungi is favored by high moisture and moderate temperatures and that low relative humidity and extreme temperatures inhibit growth and spore germination.