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Phylogenetic Tree

The evolution of life is often represented as a tree, with branches corresponding to the classification of organisms. All living things share the same origin which is the trunk, which then divides into various branches, which in turn divide into new branches and so on until it ends up as a leaf on the end. This leaf corresponds to a single species.

This idea of a phylogenetic tree is now widely accepted, but with the development of molecular biology, the reality is that the branches may be neither so neatly divided nor the leaves so clearly separated as previously thought and that rather the leaves are intermingled. There are various ways to depict the evolution of life, such as circular or even without a starting point.

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