CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
3rd Edition
ISBN: 9780135191811
Author: Urry
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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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.
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?
As humanity advances, many improvements have been made with the medical field. We now have the ability to:
• Help correct bad vision (Glasses, contact lenses, laser surgery).
• Allow diabetics a second chance (insulin shots).
• Increase the life of cancer patients. (Chemo)
• Correct bad teeth (orthodontic braces)
• And much more.
What is to be noted is that these diseases are genetic and long ago were enough to kill people with them (A near-sighted
person would not be able to see dangers in front of them.) These people would not live long enough to
pass on their genes. BUT now, genetic diseases like vison problems and diabetes are being passed on because their
victims remain alive because of our medical advances.
QUESTION: Are we interfering with our own evolution as a
species?
• If yes, why should we let these diseased people stay alive?
What can they contribute to our evolution?
• If no, has our evolution focused on a different selection
pressure? What trait are we further evolving…
Chapter 24 Solutions
CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
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 - Prob. 7TYUCh. 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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