1. The figure below depicts a phylogenetic tree of ebola virus strains sampled from various outbreaks in Africa over many decades.(SL = Sierra Leon, GN = Guinea, DRC = Dem. Rep. of Congo) This figure is similar to Figure 6.18 that depicted the evolutionary relationship between mitochondria, chloroplasts, and various prokaryotes, but in this case is organized horizontally over time. Some researchers hypothesize that ebola has been transmitted from a natural reservoir in wild animals (e.g. bats) to human populations on multiple occasions. Such transmissions are called zoonotic events.
a. Describe what this figure indicates about the evolutionary relationship of the most recent 2014 outbreak strain compared to other strains. (40 words max)
b. Imagine you sampled ebola virus from wild animal populations in Africa, sequenced the viral genome, and aIDed it to this chart. If these outbreaks each occurred due to zoonotic events, where would you expect your “wild” ebola to be connected on this figure.
Draw in a labeled branch to illustrate your answer and explain your answer. (40 words max)
2. a. Researchers were likely erroneous in reaching the conclusions illustrated in the evolutionary tree based on ribosomal DNA (Figure 6.4) Provide an explanation of why the evolutionary relationships depicted in Figure 6.4 appear the way they do, and why that is incorrect. Use data to support your answer. Answer limit: 100 words
b. What is the most likely origin of chloroplasts and mitochondria, and how might they have become eukaryotic organelles? Use data to support your answer for each one. Answer limit: 75 words
Attachment:- Quiz.pdf
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