Scientists use theories to explain observed phenomena. Which of the following combinations of observed phenomenon and explanation shows how scientists developed the theory that explains antibiotic resistance in bacteria?
Observed phenomenon
Explanation
A.
Resistance to an antibiotic appears soon after an antibiotic is first used
Bacteria respond to a new antibiotic by developing resistance
B.
Resistance to an antibiotic appears soon after an antibiotic is first used
Bacteria with alleles that provide resistance to the antibiotic survive treatment and pass on their alleles
C.
Bacteria with alleles that provide resistance to the antibiotic survive treatment and pass on their alleles
The frequency of resistant alleles increases in a bacterial population
D.
Antibiotic resistance in bacteria is on the increase in hospitals
Patients in hospitals are more susceptible to infection than the general population.