Look at the picture, then give the missing word in this sentence. The number of antibiotic-resistant bacteria will __________ over time.

Look at the picture. What is likely to have killed the less resistant strains of bacteria?

____ ability to resist antibiotics has improved over the years.a) Bacterias’b) Bacteriae’sc) Bacteriaes’d) Bacteria’s

In this experiment, the bacteria stopped spreading when they reached an area with a higher concentration of antibiotics. Remember that there are millions of bacteria and that they reproduce very quickly. After a while, a new "mutant" population can be seen fanning out from a single point.Using the concepts from this lesson, explain how this new population with higher antibiotic resistance arises.

Bacteria from three different cultures were plated on agar plates containing ampicillin, an antibiotic. The number of colonies that grew on each plate can be seen in the graph below. If you assume that 100 bacteria were plated on each plate, what percentage of the bacteria on plate B were resistant to ampicillin?multiple choice3%0%10%100%

Describe what antibiotic resistance is and explain how it develops in a population of bacteria.