For tetracycline , describe an experiment that you could use to determine if a bacterial sample taken from a person was
resistant to your antibiotic. Be sure to describe all steps of the
experiment including your independent, dependent and control
variables.

penicillin was the first antibiotic discovered. Alexander Fleming discovered it in 1928. It was used widely during World War II. However, the sulfonamides were the first antibiotic class used clinically (in the 1930's). The discovery of antibiotics revolutionized medicine by making once-deadly infections treatable. There are now hundreds of antibiotics, classified into several categories. These antibiotic classes include:

Explanation:

sana makatulong!

answer: the answer is b

your answer is "the 1950's"