4penicillin is an antibiotic that was discovered in 1928. today, many species of bacteria have acquired resistance to penicillin. this adaptation occurred as the result of

the endomembrane system is a series of compartments that work together to package, label, and ship proteins and molecules. in your cells, the endomembrane system is made up of both the endoplasmic reticulum and the golgi apparatus. these compartments are folds of membranes that form tubes and sacs in your cells.