Help pleas A patient has a severe bacterial infection. within a few weeks of treatment with an antibiotic, the bacterial population consists entirely of
antibiotic-resistant bacteria. How can this outcome most likely be explained?
OA The antibiotic caused a mutation in the bacteria's RNA,
OB. The bacteria began reproducing at a faster rate than before the antibiotic treatment.
Oc. The antibiotic created resistance in the bacteria, and the bacteria are passing the resistance to one another.
oDA Small population of antiblotic-resistant bacteria were present before the treatment, and natural selection increased their
frequency.

D

Explanation:

The antibiotics are targeting bacteria that are not resistant to the antibiotic and any that are will survive treatment. Bacteria can reproduce and share their resistance quickly.

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.