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Chapter 23 (BIO 152)

Teacher: P. Smith
Horizontales
Evolved from the scales of reptiles
This group includes most recent common ancestor and all descendants
Homologous behavior for crocodiles, birds and dinosaurs
Phylogenetic tree forms groups based on these traits
Produces similar morphologies in distantly related species
Phylogenetics helps to explain species
Study of relationships among species
Phylogenetic tree
Cladogram with fewest evolutionary changes is favored
Verticales
More highly evolved traits are called
The biological species concept refers to species that are reproductively _______
Involves making anatomical comparisons
Group does not include most recent common ancestor
Evolutionary changes are sometimes reversed, meaning that evolution is not
Reconstruction & study of evolutionary relationships
This type of structure is an example of homoplastic convergence
These structures are derived from the same ancestor