The new material in the text, compared to the existing material described in earlier discussions, is more complex and detailed. The hierarchical classifications can also be applied to the tree, while phylum, classes, orders, and the other elements of the taxonomy are represented by various locations in the branches (with the smaller classes being further down the branches and the original patterns being closer to the trunk.) In addition to the described elements, the consideration of the branching tree in the patterns of evolution is further useful in explaining comparative anatomy; this also served to help explain evolution in its early years of development.
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