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I inoculated nutrient agar with bacillus subtilis and it made a dark green colour on agar plates.
Blood agar is a bright red, opaque medium. The variety of complex nutrients found in blood supports the growth of most bacteria, fastidious and otherwise, that would be encountered by students. Such media are said to be complex (incapable of being chemically recreated) and enriched (containing an uncommonly rich array of nutrients).