$A$ chemical substance produced by a microorganism for inhibiting the growth of another is

Alexander Fleming worked on which of the following bacteria?

Where do microbes live?

Identify the correct statements with respect to antibiotics:
$(i)$ Fleming,Chain,and Florey were awarded the Nobel Prize in $1945$.
$(ii)$ Antibiotics have greatly improved our capacity to treat deadly diseases.
$(iii)$ Penicillin was used to treat American soldiers wounded in World War $I$.

Identify the correct statements from the following:
$(A)$ Microbes have been used for centuries.
$(B)$ Not all microbes are pathogenic.
$(C)$ There are various methods to culture microbes in a nutrient medium.
$(D)$ Fungi,Cycas,viruses,and bacteria are examples of microbes.

$A$ process that uses micro-organisms to convert harmful industrial wastes into less toxic or non-toxic compounds is known as: