The Bacterial Growth Curve & Petri Dish Earth

In 1993 when I was a first year biology student I first became aware of what is known as the bacterial growth curve. It is a cornerstone theory of microbiology, one that every microbiology student learns probably on their first day. Best described by a simple graph (see figure below) it describes the population trend of bacteria in an enclosed petri dish, with a finite food source (in the form of fortified agar) at constant temperature, and no inputs from exterior environments post inoculation, i.e. nothing further is added to the petri dish once the bacteria of choice are introduced. Continue reading “The Bacterial Growth Curve & Petri Dish Earth”