For the first set of questions, please read the paper "Phylogenomic evidence for multiple losses of flight in ratite birds" by Harshman et al. Focus more on the concepts presented in the paper. If the authors' results are correct, how many times was flight lost in this clade of birds? Is it reasonable to assume that loss of flight could evolve many more times than the evolution of flight in the paleognaths? Why?
Added by Paula M.
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Step 1: The authors of the study found that flight was lost independently at least three times in the clade of birds they studied. Show more…
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