microorganism (an organism too small to see with the naked eye) that has the attribute distinctive (different and unusual, characteristic of its type)
Bacteria are used in many yeast products or dairy. Bacteria is even in yogurt or things like sourdough bread.
used for cleaning up oil spills used for cleaning up oil spills used for cleaning up oil spills
Several individual organisms (especially of the same species) living together in close association.The bacteria in the colony would be genetically too similar.
The characteristic of bacteria would be that they are unicellular!