Bacteria that were once treatable through the application of antibiotics are now resistant to them, causing severe infections in hospital patients. This is a case of Natural Selection where __________act as the selective agent. A: humans B: Poisons C: environmental changes D: None of these answers are true

Bacteria that were once treatable through the application of antibiotics are now resistant to them, causing severe infections in hospital patients. This is a case of Natural Selection where __________act as the selective agent. A: humans B: Poisons C: environmental changes D: None of these answers are true

Basic Clinical Lab Competencies for Respiratory Care: An Integrated Approach

5th Edition

ISBN:9781285244662

Author:White

Publisher:White

Chapter1: Basics Of Asepsis

Section: Chapter Questions

Problem 2SEPT

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Scenario C: Your Uncle raises beef cattle and is considering adding low amounts of antibiotics to their feed because he heard it makes them grow larger. Explain to him: The concept of using antibiotics for "essential use only." The process of natural selection. How low levels of antibiotics select for resistant bacteria. How these antibiotic resistant bacteria can then be harmful to not only cows, but also humans.
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Natural selection occurs when which of the following conditions are met? Group of answer choices a.Variations between individual organisms lead to differential survival chances. b.The conditions in an ecosystem support a wide range of living organisms c.Individual organisms depend on each other to obtain available resources. d. Habitat and nutrient resources in an area are plentiful over a long period of time.
Antibiotic resistance is on the rise due to greater use of antibiotics, including the use with livestock. Explain your understanding of the rise in use of antibiotics. How are antibiotics used in raising livestock? How does this pose a threat to humans? What can we learn about the process of natural selection and evolution from the antibiotic-resistant bacteria? How should this change the use of antibiotics? Your post/article should be a minimum of 500 words in length.
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Wolbachia is a genus of bacteria that infect cells of invertebrates. Surveys have found that up to a fifth of insect species have at least some individuals infected with Wolbachia. Pathogen or parasite? This endosymbiont (a symbiont that lives inside its host) bacteria can have many effects on its host, including killing offspring and changing the sex of offspring. Ary Hoffmann from the University of Melbourne in Australia, Michael Turelli from the University of California at Davis, and their associates have been studying Wolbachia infections in populations of Drosophila simulans from California. From the initial infection around 1980, Wolbachia infection spread northward across the state during the 1980s and 1990s. The most striking manifestation of infection in this fly species is cytoplasmic incompatibility: offspring produced in crosses where males are infected and the females are uninfected tend to die early in development. In crosses between infected males and infected females,…
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