Agar is added to Broth medium:
Ans. B. To make the medium solida. Broth media can be made solid by adding agar, a gel like polysaccharide extracted from red algae,b. Broth with about 1.5% agar added will be liquid when heated, but solid at room temperature, making it easy to pour into a vessel, such as a Petri dish or test tube when hot.c. The solution then becomes solid once cooled.
To make the medium liquid
To make the medium solid
To provide extra nutrition to grow
None
Culture media and method