Petri dish Petri dish A Petri dish (sometimes spelled "Petrie Dish" and alternatively known as a Petri plate or cell-culture dish), named after the German bacteriologist Julius Richard Petri, is a shallow cylindrical glass or plastic lidded dish that biologists use to culture cellssuch as bacteriaor small mosses. Modern Petri dishes usually feature rings and/or slots on their lids and bases so that when stacked, they are less prone to sliding off one another. Multiple dishes can also be incorporated into one plastic container to create a "multi-well plate". While glass Petri dishes may be reused after sterilization (via an autoclave at
Shallow water marine environment they occur on the bottoms of beds deposited in shallow water environments. The water in this environment is mostly clear and shallow. It is said that if shallow marine environments can be defined by their distributional patterns of marine organisms in terms of temperature, then deductions can be made from that of the past patterns in terms of paleolithic zones. Today, there are 3 major defining criteria used in defining shallow marine environments, these are: The faunal provinces, the faunal elements, and the degree of latitude. However, the limits of different present-day shallow marine environments in terms of climatic zones