Biological systematics is the study of the diversification of living forms, both past and present, and the relationships among living things through time. Relationships are visualized as evolutionary trees (synonyms: cladograms, phylogenetic trees, phylogenies). Phylogenies have two components: branching order (showing group relationships) and branch length (showing amount of evolution). Phylogenetic trees of species and higher taxa are used to study the evolution of traits (e.g., anatomical or molecular characteristics) and the distribution of organisms (biogeography).
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synanthrope
A synanthrope (from ancient Greek σύν sýn "together, with" and ἄνθρωπος ánthrōpos "man") is an organism that evolve...

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A kouros (plural kouroi , Ancient Greek κοῦρος ) is the modern term given to those representations of male youths which first appear i...
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In the sport of cycling , a chain gang is a group of cyclists in a close knit formation usually of two parallel lines. The formation comes...
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