Chapter 7. Animal Classification, Phylogeny, and Organization. Classification of Organisms. Systematics or taxonomy Study of the kinds and diversity of organisms and of the evolutionary relationships among them. A Taxonomic Hierarchy. Taxon
Animal Classification, Phylogeny, and Organization
Figure 7.5 This hypothetical cladogram shows five taxa (1-5) and characters (A-H) used in deriving taxonomic relationships.
Figure 7.7 Sponges display cell-aggregate organization and some sponges are asymmetrical (Monochora barbadensis).
Figure 7.9 Bilateral symmetry is accompanied by the formation of a distinct head (cephalization).
Figure 7.13 Developmental characteristics of protostomes and deuterostomes.