The phenomenon of antibiotics was discovered by

From the given below,which one increases vitamin $B_{12}$ in our stomach and also plays a very beneficial role in checking disease-causing microbes?

The nutritive medium for growing bacteria and many fungi in the laboratory is called

Who was the first discoverer of antibiotics?

The oldest cultivated organism,yeast,was discovered by:

$A$ genetically engineered microorganism used successfully in bioremediation of oil spills is a species of