For given species or groups of species,some taxonomists and evolutionary biologists disagree on which common ancestry and evolutionary relationships may exist.They may hypothesize different common ancestors (nodes)or descendents (clades).Still,where fossil,or phenotype,or DNA sequence,or other factors make decisions difficult in preparing the cladogram,researchers commonly ensure their interpretation is the most

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The term "parsimonious" refers to the idea that the simplest explanation is often the most likely. In the context of constructing cladograms, this means that researchers will choose the hypothesis that requires the fewest evolutionary changes or "steps" to explain the observed data. This approach is known as "parsimony" or "Occam's Razor." It is the most logical and objective way to interpret ambiguous data and ensure that the cladogram is as accurate as possible.

For Given Species or Groups of Species,some Taxonomists and Evolutionary