Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 24, Problem 9TYU
FOCUS ON EVOLUTION
In patients infected with nonresistant strains of the tuberculosis bacterium, antibiotics can relieve symptoms in a few weeks. However, it takes much longer to halt the infection, and patients may discontinue treatment while bacteria are still present. How might this result in the evolution of drug-resistant pathogens?
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Antibiotic resistant bacteria have become a major concern for many public health officials. Widespread use of antibiotics has created an evolutionary pressure on infectious bacteria to develop immunity to these medications. The result is an increase in antibiotic resistant microbes, particularly in settings where antibiotics are commonly used, such as hospitals. One strategy public health officials have devised to counteract these infectious microbes is "antibiotic cycling” where specific antibiotics are withdrawn from the market for a period of several years, then reintroduced as another antibiotic is withdrawn.
How would this strategy help limit antibiotic resistance?
A. It is impossible for a bacterium to maintain resistance to two antibiotics at once
B. When a given antibiotic is not in use, it is an evolutionary disadvantage to carry the unneeded gene
C. If a specific antibiotic is removed from the market it is possible to substitute with a related antibiotic such as…
The application of evolution to understanding disease is widespread and productive. What is the benefit of applying Darwinian principles to medical practice?
Acquisition of antibiotic resistance is driven by bacterial exposure to antimicrobial agents (including antibiotics). This is a good example of natural selection; only the most fit (i.e., those with mutations conferring resistance, survive to reproduce and fill the niche with resistance organisms). Discuss two methods to prevent antimicrobial resistance within your community, but NOT a healthcare setting.
Chapter 24 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 24.1 - What hypothesis did Miller test in his classic...Ch. 24.1 - How would the appearance of protocells have...Ch. 24.1 - Prob. 3CCCh. 24.1 - Prob. 4CCCh. 24.2 - Contrast the cellular and DNA structures of...Ch. 24.2 - Distinguish between the four major modes of...Ch. 24.2 - Prob. 3CCCh. 24.2 - Prob. 4CCCh. 24.3 - Although rare on a per gene basis, new mutations...Ch. 24.3 - Distinguish between the three mechanisms by which...
Ch. 24.3 - In a rapidly changing environment, which bacterial...Ch. 24.3 - WHAT IF? If a nonpathogenic bacterium were to...Ch. 24.4 - Explain how molecular systematics and metagenomics...Ch. 24.4 - WHAT IF? What would the discovery of a bacterial...Ch. 24.5 - Explain how prokaryotes, though small, can be...Ch. 24.5 - Prob. 2CCCh. 24.5 - Prob. 3CCCh. 24.5 - Prob. 4CCCh. 24 - Which of the following steps has not yet been...Ch. 24 - Fossilized stromatolites A. more than 2.8 billion...Ch. 24 - Prob. 3TYUCh. 24 - Photoautotrophs use A. light as an energy source...Ch. 24 - Which of the following statements is not true? A....Ch. 24 - Prob. 6TYUCh. 24 - Plantlike photosynthesis that releases O2 occurs...Ch. 24 - SCIENTIFIC INQUIRY INTERPRET THE DATA The...Ch. 24 - FOCUS ON EVOLUTION In patients infected with...Ch. 24 - FOCUS ON ENERGY AND MATTER In a short essay (about...Ch. 24 - Prob. 11TYU
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- Evolutionary changes of antibiotic resistant bacteria increase the ability of a species to survive and reproduce under any circumstances (True or false) give explaination for answer?arrow_forwardHi this is an intro paragraph for my short essay on antibiotic resistance connecting to natural selection and microbiology. please add or correct anything it needs!arrow_forwardThere are concerns about overuse and misuse of antibacterial drugs, and the association of these with increased antibiotic resisstance in bacteria. Of the following, which best explains this? Antibiotic exposure directly causes many of bacterial in a population to mutate and develop new antibiotic resistance traits. If antibiotic use occurs repeatedly in a person, the dosage of the drug needs to be increased to work in a patient’s system because he/she will develop physiological tolerance to the antibiotic. Exposure to an antibiotic causes bacteria to die or become stronger; stronger bacteria will be better able to cope with additional exposures to any antibiotic drug, eventually becoming immune to all antibiotics. Antibiotics kill susceptible cells and even a small number of existing resistant bacteria that survive will become the majority of the population that remains, leading to populations that are resistant to this drug.arrow_forward
- Answer question 4arrow_forwardMessenger ribonucleic acid, or mRNA, aided in the speedy development of the COVID-19 vaccine, preventing many individuals from being ill. How will this medical technology aid us in the fight against emerging infections in the future?arrow_forwardBASED ON THIS TEXT: Identify the biological process by which the malaria carrying mosquitoes (Anopheles coluzzi or Anopheles gambiae) developed insecticide resistance.arrow_forward
- An outbreak of Ebola between 2014 and 2016 resulted in 28,616 cases and 11,310 deaths in Guinea, Liberia and Sierra Leone. An additional 36 cases and 15 deaths were reported outside these 3 countries. This deadly disease urged the need for extensive research on Ebola to better understand and treat the disease and prevent future outbreaks. Ebola is a - SSRNA virus. What does this mean for how it is converted into proteins? Does this virus require additional machinery to be infectious? Can you hypothesize based on how it replicates in the cell what scientists might hope to target for treatment or prevention of Ebola?arrow_forwardSince early 2020 human societies around the world have suffered a viral pandemic and struggled to cope with Covid-19. Provide one example of a policy or response that has been effective and one example of a policy or response that has been ineffective. Propose a policy that should be implemented in the near future. ( should be based on your knowledge of evolutionary biology.)arrow_forwardIn the mid-1990s, researchers discovered an enzyme in HIV called protease. Once the enzyme's structure was known, researchers began developing drugs that fit into the active site and blocked it. This strategy for stopping HIV infections is an example of what phenomenon? OA) feedback regulation OB) competitive inhibition OC) immunization OD) allosteric regulationarrow_forward
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