Bacteria are microscopic organisms that reproduce rapidly and often cause disease.
Antibiotics are drugs given to people to cure bacteria-caused diseases. Since the 1950s,
scientists have observed that antibiotics cannot kill many kinds of bacteria. What best
explains the reason why antibiotics are less effective now?
(10 Points)
O
People today do not take antibiotics as directed by doctors.
O
Antibiotics used today are weaker drugs than those used in the past.
O
The genes of some kinds of bacteria make them resistant to antibiotics.
O
Doctors have increased the testing of patients for diseases caused by bacteria.