It is named SF for <em>Streptococcus faecalis.</em>
The genus Streptococcus will be cultured.
Explanation:
A selective media is the one which allows the growth of only certain organism with selective properties to ensure that any other organisms do not grow on the media.
<em>Streptococcus faecalis</em> is a gram-positive cocci which contaminates milk and water through the fecal route as it inhabits the gastrointestinal tracts of several mammals including humans.
The media in which <em>Streptoccous faecalis</em> grows is termed as SF indicating the first letter of the genus and second for the species and being a selective media it can only culture the genus Streptococcus.
Well, dissolved carbon is basically carbon, and carbon and other atmospheric gases dissolve in water. So that would most likely lead to the answer being oceans and lakes.
