Evolutionary Analysis (5th Edition)
5th Edition
ISBN: 9780321616678
Author: Jon C. Herron, Scott Freeman
Publisher: PEARSON
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Textbook Question
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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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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- HIV attacks only specific types of human cells, such as certain whiteblood cells and nerve cells. Can you explain why a virus can entersome types of human cells but not others?arrow_forwardBecause viruses lack some of the traits seen in all living things, many scientists do not believe viruses to be genuinely "alive." Using a few characteristics of live organisms as examples, explain why viruses may not be truly "alive."arrow_forwardOne of the first and most important targets for drugs to fight infection with HIV (a retrovirus) is the reverse transcriptase enzyme. Why?arrow_forward
- Efforts to produce an HIV vaccine have met with limited success. What aspects of the virus and its replicative strategy make it difficult to produce a vaccine against HIV? What other kind of virus might be similarly different to vaccinate against? What similarities and differences exist between the two types of virus that account for the differences in vaccine production?arrow_forwardIn your own words, explain how the viral proteins that bind host Rb (retinoblastoma) proteins help viruses reproduce.arrow_forwardViruses may be latent for a long period of time. For example, HIV may be latent for many years, during which new viruses are not made. What are three different mechanisms of viral latency?arrow_forward
- All of the following statements correctly describes the properties of Influenza A virus EXCEPT A-Viral transcription occurs in the nucleus B-Mature virion are released by budding C-Single stranded positive sense RNA virus D-Attaches to cell-surface sialic acidarrow_forwardSARS-COV-2 is mainly transmitted through respiratory droplets when an infected person sneezes, coughs, or talks. how might this relate to the size and/or structure of viruses?arrow_forwardMany viruses have the ability to resurrect dead cells. Why investigating this feature of viruses may be relevant to youarrow_forward
- As a general rule, viruses are not considered to be alive based on several reasons. One such reason is that some viruses use RNA as their genetic material instead of DNA. Which of the five biological themes does this violate? Briefly explain why.arrow_forwardRhinovirus, 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 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.arrow_forwardList three differences between the structure of HIV and the virus that causes influenza. For one of these differences, explain how the STRUCTURE is key to the FUNCTION of the virus.arrow_forward
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