Nutrient Agar is a gelatinous substance used in laboratories to grow and cultivate microorganisms. It is made from agar, a seaweed extract, combined with nutrients like peptones and beef extract, which provide essential growth factors for bacteria and fungi. This medium is commonly used in microbiology to isolate and identify different species of microbes. The preparation of Nutrient Agar involves dissolving the ingredients in water, sterilizing the mixture, and then allowing it to solidify in petri dishes. It serves as a basic growth medium for a wide range of organisms, making it a fundamental tool in studies related to microbiology and biotechnology.