Which of the following most accurately describes the development of the antibiotic penicillin? a.) one scientist worked tirelessly for years to create a drug that could prevent death from infections b.) it was developed by ernest chain, who knew about the penicillium mold’s antibacterial properties from his own life experiences c.) fleming shows that the penicillium mood could kill bacteria and observed that it was very effective when taken orally or intravenously d.) it was developed over many years through work of multiple scientists, some of whom collaborated and some of whom didn’t know about the work of the others

Out of the given options, “Fleming shows that the Penicillium mold could kill bacteria and observed that it was very effective when taken orally or intravenously” is most accurately describes the development of the antibiotic penicillin

Option C

Explanation:

It was in 1928, when Alexander Fleming discovered the most effective antibacterial drug to knock down severe bacteria and hence, saved lives. It all began with the development of mold on a staphylococcus culture plate while Fleming was experimenting with the influenza virus.

Penicillin has helped numerous people to get aided from severe illness in the 20th century and especially during the World War II. The use of penicillin has helped in treating bacterial endocarditis, pneumococcal pneumonia, bacterial meningitis etc.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.