Section f pesticide resistance on the website

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Section F: Pesticide Resistance On the ‘Website-Evolution’ page, click on “Pesticide Resistance”. …..go through the animation. S % (Susceptible – SS, SR) R% (Resistant – RR) Generation #1 After 1 st spray of DDT- Survival Rate Generation #2 After 2 nd spray of DDT- Survival Rate Generation #3 1. What happened to the frequency of the resistant allele in the population? 2. Could the entire population of insects become resistance to DDT in the future? Section G: Evolution Game On the ‘Website-Evolution’ page, click on “Evolution Game”. …..play the survival game. 1. What is the key to survival? _________________________ 2. What were your life-preservers? ________________ How did this help the population? ____________ _________________________________________ Section H: Rise of the Superbugs On Monday, Eva went to the ER following a fall from her bike. Fortunately, her only broken bone was a finger. But she suffered scrapes and cuts, including some deep cuts on her legs. After spending several hours in the ER having her wounds cleaned, stitched and bandaged, Eva returned home. Tuesday morning, one of the deeper cuts on Eva’s leg was red and felt warm. She had a few pills of an antibiotic left over from her bout with strep throat that previous winter. Thinking it might help to prevent infection, she took them according to the prescription instructions. Throughout Tuesday, the cut on Eva’s leg became increasingly red, swollen, and painful. Eva felt awful and returned to the hospital on Tuesday night. Her cut had become infected. The doctors cleaned and re-stitched her leg and prescribed a daily dose of Antibiotic A, a stronger version of the same antibiotic Eva had taken at home just that morning. By Thursday, Eva’s infection had spread to the point where it was too painful to walk. In addition, Eva felt ill. She returned to the hospital and this time was admitted. The doctors immediately administered a different kind of antibiotic, Antibiotic C, directly into Eva’s bloodstream through an intravenous tube. Friday, Eva felt better and her leg became less painful and swollen. But on Saturday, it was clear that Eva had taken a turn for the worse. The infection on her leg continued to spread and she had become feverish. The medical staff involved with Eva’s case held a meeting to plan the next steps in Eva’s treatment. 1. What might explain why Eva’s infection is not responding to treatment by antibiotics? 2. What would be the next step in Eva’s treatment?
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