👉 The Heppner grapha is a type of grapha that is commonly used for visualizing bacterial populations in culture media. It consists of a series of concentric circles, each representing a different stage in the growth process. The circular sections represent bacteria at various stages of their life cycle, such as exponential growth, phase II, and phase III. This grapha helps researchers visualize how bacterial colonies grow over time, allowing them to study the effects of environmental factors on bacterial populations.
