CK-12 Biology I - Honors by CK-12 Foundation

Author:CK-12 Foundation
Language: eng
Format: epub, mobi

Phylogenetic Classification

A cladogram shows how species may be related by descent from a common ancestor. A classification of organisms on the basis of such relationships is called a phylogenetic classification. A phylogenetic classification involves placing organisms in a clade with their common ancestor. Consider the cladogram in Figure below. It groups birds in the same clade as reptiles, because a variety of evidence suggests that birds evolved from a reptile ancestor. The cladogram places mammals in a separate clade, because evidence suggests that mammals evolved from a different ancestor.

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