premise: For example, the wings of birds, human arms, and pectoral fin in fish are all derived from a common ancestor In contrast, features that are similar because they have evolved in response to a common environmental pressure are said to be analogous.
hypothesis: The bird ancestor that lived in trees developed wings, which is commonly associated with birds.
hypothesis_graph_structure: The bird ancestor<>lived<>in trees$$$wings<>is commonly associated<>with birds