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The primary reason for the incredible success of viruses in their incredible diversity. The primary sources of this diversity are Blank 1 Blank 2 Blank 3 Blank 4 Answer 2 points Question 2 1. Briefly describe why viruses are said to exist as populations of sequences and not single sequences. What is the technical term for this concept. Answer Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). Path: p Words:0 2 points Question 3 1. The primary reason Human infections by Ebola virus are largely localized to parts of Africa is which of the following (select one)? Answer A . Africans have a gentic polymorphism that enhances their resistance to malaria, but makes them more susceptible to Ebola (and other filovirus) infections. B. Ebola is used as a bio­weopon by government militias fighting political instability in central Africa. C. The primary animal reservoir for the Ebola virus is geographically restricted to Africa D . The warm dry climate in Africa enables the virus to remain active outside the host for extended periods. 2 points Question 4 1. The higher the mutation rate of an RNA virus, the more likely the virus will be able to succeed. Answer True False 1 points Question 5 1. Although the polio virus has been around for centuries, it only became a significant health problem in the developing world in the 20th century due to (select one)? Answer Polio was transmitted to humans by a zoonosis in the 1930’s Vaccination programs for polio began Loss of natural vaccination due to improved sanitation. Virus evolved to more pathogenic form Humans were better able to travel and migrate which enhanced dissemination of the virus 2 points Question 6 1. The graph below shows the relationship between viral genome size and mutation rate. Explain the observed relationship between genome size and mutation rate (3­5 sentences max). Note: The mutation rate is expressed as the number of substitutions per nucleotide per generation,. For viruses a generation is defined as a cell infection in viruses (?s/n/c). Answer Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). Path: p Words:0 2 points Question 7 1. Coronaviruses are a class of ssRNA viruses that are responsible for a number of respiratory diseases including SARS and the recently identified Middle Eastern Respiratory Syndrome (MERS). Coronaviruses are the largest known RNA viruses with genomes ranging from 26­32 kb. Coronaviruses are able to achieve such large genomes because they possess a gene not found in other RNA viruses. Using what you have learned this semester, speculate in 3­4 sentences the likely function of this gene that enables coronaviruses to possess such large genomes. Justify your answer. Answer Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). Path: p Words:0 2 points Question 8 1. RNA viruses tend to occupy broad ecological niches with multiple host species, while DNA viruses tend to coevolve with host with fewer host species. Answer True False 1 points Question 9 1. List three factors that explain why there appears to be an increase in the number Emerging Viral Diseases globally. Justify each factor in 1­2 sentences. Answer Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). Path: p Words:0 2 points Question 10 1. Match the following Emerging viruses with the disease or symptoms they cause. Answer Answer Polio Virus A. Read Answer Items for Question 10 Transmission of virus to humans is highly dependent on West Nile climate/weather Virus because it influences Read Answer populations of rodent Items for Question 10 vector B. Emerged due to improved sanitation that Sin Nombre broke natural vaccination cycle Read Answer Virus was brought to Americas by earlier C. Items for Question 10 explorers. Beliveved to have wiped out native populations because they did not Severe have immunity to virus. Acute D RespiratoryFirst major viral epidemic documented to . Syndrome be spread by air travel Virus E. Brought to United States by insect vector Read Answer Items for Question 10 Variloa Read Answer Items for Question 10 2 points Question 11 1. Explain why a virus that is well adapted to one species and causes no apparent disease can upon a switch to a new host range cause severe disease (Max 3­5 sentences)? Answer Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). Path: p Words:0 2 points Question 12 1. What is the last name of the scientsist who accredited with the following quote: “In the battle by attrition, humans have a real problem competing with microorganisms. Here we are, here are the bugs, they’re looking for food, we’re their meal in one sense or another, how do we compete?”

The primary reason for the incredible success of viruses in their incredible diversity. The primary
sources of this diversity are Blank 1 Blank 2 Blank 3 Blank 4
Answer
2 points

Question 2
1.

Briefly describe why viruses are said to exist as populations of sequences and not single
sequences. What is the technical term for this concept.
Answer

Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

Path: p
Words:0

2 points

Question 3
1.

The primary reason Human infections by Ebola virus are largely localized to parts of Africa is
which of the following (select one)?
Answer
A
.

Africans have a gentic polymorphism that enhances their resistance to malaria, but makes
them more susceptible to Ebola (and other filovirus) infections.
B. Ebola is used as a bio­weopon by government militias fighting political instability in
central Africa.

C. The primary animal reservoir for the Ebola virus is geographically restricted to Africa
D
.

The warm dry climate in Africa enables the virus to remain active outside the host for
extended periods.
2 points

Question 4
1.

The higher the mutation rate of an RNA virus, the more likely the virus will be able to succeed.
Answer
True
False
1 points

Question 5
1.

Although the polio virus has been around for centuries, it only became a significant health
problem in the developing world in the 20th century due to (select one)?
Answer

Polio was transmitted to humans by a zoonosis in the 1930’s
Vaccination programs for polio began
Loss of natural vaccination due to improved sanitation.
Virus evolved to more pathogenic form
Humans were better able to travel and migrate which enhanced dissemination of the virus
2 points

Question 6
1.

The graph below shows the relationship between viral genome size and mutation rate. Explain
the observed relationship between genome size and mutation rate (3­5 sentences max).
Note: The mutation rate is expressed as the number of substitutions per nucleotide per
generation,. For viruses a generation is defined as a cell infection in viruses (?s/n/c).

Answer

Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

Path: p
Words:0

2 points

Question 7
1.

Coronaviruses are a class of ssRNA viruses that are responsible for a number of respiratory
diseases including SARS and the recently identified Middle Eastern Respiratory Syndrome
(MERS). Coronaviruses are the largest known RNA viruses with genomes ranging from 26­32
kb. Coronaviruses are able to achieve such large genomes because they possess a gene not found
in other RNA viruses. Using what you have learned this semester, speculate in 3­4 sentences the
likely function of this gene that enables coronaviruses to possess such large genomes. Justify
your answer.
Answer

Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

Path: p
Words:0

2 points

Question 8
1.

RNA viruses tend to occupy broad ecological niches with multiple host species, while DNA
viruses tend to coevolve with host with fewer host species.
Answer
True

False
1 points

Question 9
1.

List three factors that explain why there appears to be an increase in the number Emerging Viral
Diseases globally. Justify each factor in 1­2 sentences.
Answer

Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

Path: p
Words:0

2 points

Question 10
1.

Match the following Emerging viruses with the disease or symptoms they cause.
Answer

Answer
Polio Virus
A.
Read Answer
Items for
Question 10

Transmission of virus
to humans is highly
dependent on
West Nile
climate/weather
Virus
because it influences
Read Answer
populations of rodent
Items for
Question 10
vector
B. Emerged due to improved sanitation that
Sin

Nombre

broke natural vaccination cycle

Read Answer Virus was brought to Americas by earlier
C.
Items for
Question 10 explorers. Beliveved to have wiped out

native populations because they did not
Severe
have immunity to virus.
Acute
D
RespiratoryFirst major viral epidemic documented to
.
Syndrome be spread by air travel
Virus E. Brought to United States by insect vector
Read Answer
Items for
Question 10

Variloa
Read Answer
Items for
Question 10

2 points

Question 11
1.

Explain why a virus that is well adapted to one species and causes no apparent disease can upon
a switch to a new host range cause severe disease (Max 3­5 sentences)?
Answer

Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

Path: p
Words:0

2 points

Question 12
1.

What is the last name of the scientsist who accredited with the following quote:
“In the battle by attrition, humans have a real problem competing with microorganisms. Here we are, here are the
bugs, they’re looking for food, we’re their meal in one sense or another, how do we compete?”

 

Interested in a PLAGIARISM-FREE paper based on these particular instructions?...with 100% confidentiality?

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