In 1943, drug companies began mass-producing penicillin. at that time, it was a medical miracle and was used as a remedy for infected wounds, pneumonia, and other bacterial diseases. just four years later, however, it was no longer effective on the same diseases that it had previously been able to cure. what happened?

Are the earth's ocean floor and continents the same age geologically? why or why not?

Ascientist is examinin the cell is disrupted when she damages one specific type of macromolecule g the function of macromolecules in a cell she notices that movenent of large molecules into and out of

Which of the following describes research that would be considered basic science? a. a farmer is trying to improve his crop yields by using a new kind of fertilizer. b. a college students is curious about the growth of desert pants in the presence of excess amounts of water. c. government officials are trying to prevent the spread of new strain of influenza virus. d. a doctor is trying to determine why a patient is feeling tried and sick.b.a college students is curious about the growth of desert pants in the presence of excess amount of water