You manage a fitness gym that is open 24 hours a day. There is not always someone running the front desk and attending the equipment, so you ask patrons to clean any sweat off gym equipment when they are finished. You know that bacteria, like antibiotic resistant Staph. aureus, can grow for up to 40 days on a surface. They grow on abundant nutrients at first then slow down when they run low on nutrients at about 40 days. This bacterial growth is an example of:_____.
