Question

select all that apply
which of these are true about antibiotic resistance?
the antibiotic selects for pre - existing mutations.
the antibiotic does not cause resistance.
the antibiotic causes resistance.
the presence of antibiotics turns on genes in some bacteria that initiates resistance.

Explanation:

Antibiotic resistance occurs when bacteria have pre - existing mutations (not caused by the antibiotic itself). The antibiotic acts as a selective pressure, favoring the survival of bacteria with these mutations. Also, in some cases, the presence of antibiotics can turn on genes in bacteria that initiate resistance mechanisms.

Answer:

• The antibiotic selects for pre - existing mutations.
• The antibiotic does not cause resistance.
• The presence of antibiotics turns on genes in some bacteria that initiates resistance.