Evolutionary Analysis (5th Edition)
5th Edition
ISBN: 9780321616678
Author: Jon C. Herron, Scott Freeman
Publisher: PEARSON
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Chapter 1, Problem 12Q
Not all viruses are dangerous. (The common cold is an example.) HIV, however, is nearly 100% lethal. Describe three major hypotheses for why HIV is so highly lethal.
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Discuss the following statement: “Viruses exist in the twilight zone of life: outside cells they are simply dead assemblies of molecules; inside cells, however, they are alive.”
Rhinoviruses, the most common cause of colds, do not have a lipid envelope. Compared to enveloped viruses, these and other nonenveloped viruses tend to remain infectious outside the body longer, are more likely to be spread by contact with surfaces, and are less likely to be rendered harmless by exposure to hand sanitizer or hand washing. Explain how the lack of an envelope could contribute to these characteristics.
The Ro of Ebola has been estimated to be somewhere between 1.5 and 2. See graphic below.
The number of people that one sick person will infect (on average) is called R₂.
Here are the maximum R, values for a few viruses.
more contagious
R₂-
Hepatitis C (2) Ebola (2)
HIV (4)
SARS (4)
Mumps (10)
Measles (18)
****
What percentage of the population would have to be vaccinated to stop the spread of Ebola if it were
to be introduced to a new continent?
a. 33-50%
O b. >99%
C. 75-99%
d. 66-75%
e. <33%
Chapter 1 Solutions
Evolutionary Analysis (5th Edition)
Ch. 1 - Prob. 1QCh. 1 - Prob. 2QCh. 1 - Prob. 3QCh. 1 - Given the risk of evolution of resistance, why do...Ch. 1 - Prob. 5QCh. 1 - Prob. 6QCh. 1 - In a monograph published in 1883, Alexander Graham...Ch. 1 - Design a study to test our prediction that human...Ch. 1 - Prob. 9QCh. 1 - Suppose that HIV were the ancestor of the SIVs,...
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