Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 27.4, Problem 3CC
What is the competitive exclusion principle? List another example where this principle is demonstrated in the natural world.
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Competitive exclusion is rarely observed in ecosystems. Propose an explanation for this.
Aliivibrio fischeri is a marine bacterium that uses quorum sensing to regulate bioluminescence. These bacteria will only bioluminesce when the population is above a certain density. Why would it be advantageous to bioluminesce only when the population is large?
Chapter 27 Solutions
Prescott's Microbiology
Ch. 27.2 - What methanogenic substrates are also available in...Ch. 27.2 - What is the nutritional type of the endosymbiotic...Ch. 27.2 - How could one test to see if an insect-microbe...Ch. 27.2 - What is the role of the Riftia tube worms...Ch. 27.2 - Prob. 3CCCh. 27.2 - What is meant by tight trophic coupling between...Ch. 27.2 - Why is it important that the rumen is a reducing...Ch. 27.2 - Describe the mutualism between methanogenic...Ch. 27.2 - How does cooperation differ from mutualism? What...Ch. 27.2 - Why is the X. nematophilaS. carpocapsae symbiosis...
Ch. 27.3 - Prob. 1CCCh. 27.3 - Why is nitrification a good example of a...Ch. 27.3 - Describe the amensalism observed in attine ant...Ch. 27.3 - Prob. 4CCCh. 27.4 - How does myxobacterial predation differ from that...Ch. 27.4 - Define predation and parasitism. How are these...Ch. 27.4 - What is a lichen? Why is this considered an...Ch. 27.4 - What is the competitive exclusion principle? List...Ch. 27 - Prob. 1RCCh. 27 - Prob. 2RCCh. 27 - Prob. 3RCCh. 27 - Prob. 4RCCh. 27 - Prob. 5RCCh. 27 - Prob. 6RCCh. 27 - Prob. 7RCCh. 27 - Prob. 8RCCh. 27 - Prob. 9RCCh. 27 - Prob. 10RCCh. 27 - Prob. 11RCCh. 27 - Prob. 12RCCh. 27 - Prob. 13RCCh. 27 - Describe an experimental approach to determine if...Ch. 27 - Prob. 2ALCh. 27 - Prob. 3ALCh. 27 - Prob. 4AL
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- Explain the premise of the Lotka-Volterra Competition Model and what it tells us about the competitive exclusion principlearrow_forwardThe three microbial species shown in the graph where all treated at 70° C. When we have to sterilize a food product that contained 107 bacteria, the time taken for each bacterial species would be:- For species A :- 42 minutes For species B :- 70 minutes For species C :- 112 minutes arrow_forward Step 3 The D70 values for these three bacterial populations. D70 for microbial species A= 42 minutes B: D70 microbial species B= 70 minutes C: D70 microbial species C =112 minutes Please answer these questions below: please use drawings too (i learn best that way) For the next three questions, assume D90 = 22 minutes. At what temperature will you treat a food product? How long does it take you to kill 90% of bacteria? How long will it take you to sterilize a food product if it had 109 bacteria on it?arrow_forwardExplain Why bacteria do not cause food-borne illness until they are allowed to grow and increase their population density to a threshold number, like when being left out at room temperature for 12 hours or more. What happens as the bacteria grow in numbers? What do pathogenic bacteria synthesize? How do bacteria know what their population density is?arrow_forward
- Explain the Competitive Exclusion Principle. What does it mean, and what are its major ecological consequences?arrow_forwardname the 2 things heterotrophic organisms include.arrow_forwardWhat is one of the primary benefits of bioremediation? Group of answer choices A. to improve human health with the help of living organisms such as bacteria B. to clean up areas polluted with toxic compounds by using bacteria C. to improve soil quality for plant growth by using bacteria D. to improve bacteria for production of useful chemicalsarrow_forward
- Why would you look for ARGs in a farming context And why specifically in the waste manure produced at a farm? please prehrase and find the answer in the articlearrow_forward. How does the law of tolerance affect where populations of organisms live? Organisms are not affected by the law of tolerance. Organisms tolerate the water conditions but cannot tolerate other abiotic factors. Organisms only live where they can tolerate the conditions. Organisms live where they can tolerate the other organisms.arrow_forwardCan you please explain what is happening in this figure? Please address controls, experimental method, what conclusions can be drawn and why the data supports these conclusions, and anything else... This data is taken from this article https://www.nature.com/articles/nature13994 Thank you so mucharrow_forward
- If it takes 2 hours for a population of bacteria to grow from 100 cells to 1600 cells, what is the generation time of this bacterial species? 15 minutes 20 minutes 30 minutes 40 minutesarrow_forwardWhat happened to the piece of potato after soaking in plain water? Explain your observation based on your understanding of hypotonic enviromentarrow_forwardWhat is the difference between competitive exclusion and resource partitioning?arrow_forward
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