Other bacteria and germs could contaminate the contents in the dish. The dish is meant to isolate a subject in an experiment so one can study it. While in the dish, one can control the reactions by putting in what they want in the dish. If the dish is left open, then one will be studying the contaminates and will not get accurate results from their experiment.
A petri dish should not be left open for extended period of time because it increases the probability that the culture will be contaminated.
A Petri dish is used as a container for a medium used to grow cultures. Leaving the Petri dish open will increase the probability that your culture will be contaminated.
A "petri dish"
A petri dish is a round, shallow glass container with a glass lid. See the link below for pictures of petri dishes.
A Petri dish (or Petri plate or cell culture dish) is a shallow glass or plastic cylindricallidded dish that biologists use to culture cells[1]or small moss plants.[2
A petri dish is a tool, not a math function. It is a shallow glass or plastic cylindrical lidded dish that biologists use to culture cells.
a petri dish
A "petri dish"
a petri dish is used to study small things
beakercould be a petri dish
A Petri dish is a small, clear plastic dish that is used in science and experiments.
A petri dish with divisions is . . . used to contain several media selectively and simultaneously.
This is called a petri dish named after a German bacteriologist, Julius Petri.
The gel in a Petri dish is called "Agar".
To prevent the microorganisms from getting in the petri dish.
A petri dish is a round, shallow glass container with a glass lid. See the link below for pictures of petri dishes.
a petri dish
A petri dish is a tool, not a math function. It is a shallow glass or plastic cylindrical lidded dish that biologists use to culture cells.
A Petri dish (or Petri plate or cell culture dish) is a shallow glass or plastic cylindricallidded dish that biologists use to culture cells[1]or small moss plants.[2