““There are several types of comparative analysis for garnering evidence for an evolutionary adaptation: structural or behavioral resemblance in different phyletic lines owing to ecologically driven functional convergence (analogy), functional transformations from the same ancestral character (homology), functional tradeoffs between traits in the same phyletic line, intrageneric or intrafamilial species comparisons, and ontogenetic development. Analogy (homoplasy) reveals adaptation in similar traits that solve similar environmental problems in phylogenetically unrelated species, for example, the wings of bats and birds and flying insects, the eyes of humans and the octopus, and bipedality in therapods (carnivorous dinosaurs such as Tyrannosaurus) and humans. Homologies””
