Question 5 2.5 pts West Nile Virus Which bird species returned to expected population levels in 2005 after an initial decline due to West Nile Virus? Blue jay Tuffed titmouse American robin Extern bluebird American crow Ouestion 6 2.5 nts
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5 pts West Nile Virus Which bird species returned to expected population levels in 2005 after an initial decline due to West Nile Virus? Blue jay Tufted titmouse American robin Eastern bluebird American crow Question 6 2.5 pts Show more…
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West Nile virus kills birds of many species and can cause fatal encephalitis (inflammation of the brain) in humans and horses. The virus was first isolated in Africa (where it is thought to be endemic) in the 1930 s, and by the 1990 s it had been found throughout much of Eurasia. West Nile virus was not found in North America until 1999 (when it was first detected in New York), but since that time it has spread rapidly across most of the United States. Use the phylogenetic tree of West Nile virus isolates shown below to construct a hypothesis about the origin of the virus lineage that was introduced into the United States. The isolates are identified by their place and date of isolation.
Q6.8. Imagine that after the birds have been living in the city for many years a second big flock of birds arrives. How will the bird population size change in the 10 to 20 years after the extra birds arrive? Choose the graph that best represents how the city's bird population should change over time. (Note: there are still no predators of these birds in the city.)
Lainey R.
Based on the data given and histogram, are the following statements true or false. a) The tallest bar represents the fact that more than 25 species were 50 or less in number. b) The Lesser night hawk species is above the median in number. c) What number of species corresponds to the 43rd percentile (round answer to nearest whole number). Which bird species is in the 43rd percentile? 4. Species of birds globally are believed to be from a normal distribution with mean µ= 60 and σ= 25. Use this to answer the following questions a) Based on this distribution what percentage of birds is above the number of Common raven species? b) What is the number of species that correspond to the top 15% of birds? c) Find the proportion of birds between the number of black vultures and Black-tailed gnatcatcher.
Thuc N.
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