Four nutrient agar plates growing colonies of common Gram negative bacteria. Each independent colony arises from an individual bacterium. The size, color, shape and form of the colonies are characteristic of the bacterial species, its specific genetic makeup, and the environment which supports its growth.

Donald Johnston, (eukaryotica) author

本作品已被作者Eukaryotica释出到公有领域。这适用于全世界。 在一些国家这可能不合法；如果是这样的话，那么： Eukaryotica无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。

本檔案是使用For the Common Good，從en.wikipedia轉移到維基共享資源。