Natural Selection – Antibiotic Resistant Bacteria
Part 1
On which plate do we see evidence of antibiotic resistance?
What is the most likely reason that there are few colonies growing on the streptomycin positive plate?
Part 2
On which of these plates should we expect to see colonies of E. coli growing after incubation?
Select all that apply.
In the first part of the experiment, there were only a few colonies on the streptomycin positive plate. In this second part, there are a large number of colonies on the streptomycin positive plate that was inoculated with the antibiotic-resistant strain.
What is the most likely explanation for this difference?
Apply what you have learned:
Could overuse of unnecessary antibiotics result in a population of antibiotic-resistant bacteria?
Collected Lab Data
| E. coli strain | Streptomycin plate | Number of colonies |
| Unknown | Negative | |
| Unknown | Positive |
https://newconnect.mheducation.com 12/5/23, 1:10 AM Laboratory Simulation
| E. coli strain | Streptomycin plate | Number of colonies |
| Antibiotic-resistant | ||
| Antibiotic-resistant | ||
| Antibiotic non-resistant | ||
| Antibiotic non-resistant |
Answer Preview: Natural Selection – Antibiotic Resistant Bacteria
