Which bacteria are present in the digestive tract of cattle?

Bordeaux mixture was first used in:

Mushrooms are a rich source of . . . . . . .

The water of the holy Ganga river is considered pure due to the presence of:

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 $I$.

Which organisms have been used for human welfare for centuries?