Petri Dish - GCSE Biology Definition
Reviewed by: Lára Marie McIvor
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A Petri dish is a shallow, round, clear container with a lid, used in laboratories to grow and study microorganisms such as bacteria and fungi. It is usually made of plastic or glass and may be filled with agar, a jelly-like substance that provides nutrients and a surface for microorganisms to grow on. Scientists use Petri dishes to observe how microorganisms develop, respond to different conditions, or react to treatments like antibiotics. In GCSE Biology, Petri dishes are used in experiments to investigate microbial growth.
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