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Microbiological Cultures in Media and on Streak Plates

1.What is the three main types of microbiological culture media? Why are Petri dishes inverted after they cool?
2.Which are of a streak plate will contain the greatest amount of growth? The least amount of growth? Why?

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1. The three main types of culture media are liquid, semisolid and solid culture media. (Please note: in your question it was not clear to me if you just wanted three main types or wanted more detail. The following site has additional, more detailed information that may come in handy: ...

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