When identifying the agent responsible for causing a disease, why is evaluation of colony morphology not enough?

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.