Biology IA Exemplar: What is the effect of different active ingredients (menthol, sodium fluoride, zinc chloride, hexetidine and betaine) in mouth washes on the growth of bacteria (non pathogenic Escherichia coli strain HB101) measured in the diameter of the inhibition zone in a petri dish?

Biology IA Exemplar: What is the effect of different active ingredients (menthol, sodium fluoride, zinc chloride, hexetidine and betaine) in mouth washes on the growth of bacteria (non pathogenic Escherichia coli strain HB101) measured in the diameter of the inhibition zone in a petri dish? | RevisionDojo