Prescott's Microbiology
10th Edition
ISBN: 9781259281594
Author: Joanne Willey, Linda Sherwood Adjunt Professor Lecturer, Christopher J. Woolverton Professor
Publisher: McGraw-Hill Education
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Chapter 32, Problem 5CHI
The fruit fly Drosophila melanogaster is an excellent model system. D. melanogaster hosts the ubiquitous insect symbiont Wolbachia pipientis, but unlike most other insect hosts, it is not subject to reproductive manipulation by the bacterium. Surprisingly, infection with W. pipientis protects the fruit fly from infection by three unrelated viruses that otherwise cause 100% mortality. Discuss the differences in this rickettsial-insect symbiosis with that described in Microbial Diversity & Ecology 32.1. Do you think it is likely that W. pipientis also protects wasps against other pathogens, such as viruses? Explain your answer from the point of view of the bacterium and from the insect’s point of view.
Read the original paper: Hedges, L. M. 2008. Wolbachia and virus protection in insects. Science 322:722.
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1.) Community Diversity:
The brown and orange line represent two different plant communities.
a. Which color represents the community with a higher species richness?
b. Which color represents the community with a higher species evenness?
Relative abundance
0.1
0.04
0.001
2 4 6
8
10 12 14 16 18 20 22 24
Rank abundance
c. What is the maximum value of the Simpson's diversity index (remember, Simpson's
index is D = p², Simpson's diversity index is 1-D)?
d. If the Simpson's diversity index equals 1, what does that mean about the number of
species and their relative abundance within community being assessed?
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Chapter 32 Solutions
Prescott's Microbiology
Ch. 32.1 - What methanogenic substrates are also available in...Ch. 32.1 - What is the nutritional type of the endosymbiotic...Ch. 32.1 - Prob. 3MICh. 32.1 - How does myxobacterial predation differ from that...Ch. 32.1 - How could one test to see if an insect-microbe...Ch. 32.1 - What is the role of the Riftia tube worms...Ch. 32.1 - Prob. 1.3RIACh. 32.1 - What is meant by tight trophic coupling between...Ch. 32.1 - Why is it important that the rumen is a reducing...Ch. 32.1 - Describe the mutualism between methanogenic...
Ch. 32.1 - How does cooperation differ from mutualism? What...Ch. 32.1 - Why is the X. nematophilaS. carpocapsae symbiosis...Ch. 32.1 - Prob. 3.1RIACh. 32.1 - Why is nitrification a good example of a...Ch. 32.1 - Define predation and parasitism. How are these...Ch. 32.1 - Prob. 3.4RIACh. 32.1 - What is a lichen? Why is this considered an...Ch. 32.1 - Describe the amensalism observed in attine ant...Ch. 32.1 - Prob. 4.2RIACh. 32.1 - What is the competitive exclusion principle? List...Ch. 32.2 - How might a microbial symbiont affect the uptake...Ch. 32.2 - Cite three reasons a germfree mouse would be more...Ch. 32.2 - People who suffer from colitis often find that...Ch. 32.3 - 1. Why is it important to understand the normal...Ch. 32.3 - Why is the skin not always a favorable...Ch. 32.3 - How do microorganisms contribute to body odor?Ch. 32.3 - Prob. 1.4RIACh. 32.3 - Prob. 2.1RIACh. 32.3 - What physiological processes move the microbiota...Ch. 32.3 - What is the role of pH in determining the...Ch. 32.3 - How would you define an opportunistic...Ch. 32 - Describe an experimental approach to determine if...Ch. 32 - Prob. 2CHICh. 32 - Prob. 3CHICh. 32 - Compare and contrast the microbial communities...Ch. 32 - The fruit fly Drosophila melanogaster is an...
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