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classification

Basis of Animal Classification

The source uses levels of organization, symmetry, germ layers, coelom, metamerism and notochord.

What are the six bases of animal classification in this source?

Levels of organization, body symmetry, germinal layers, coelom, metamerism and notochord.

Basis	Recall answer
Levels of organization	Cellular, tissue, organ, organ-system levels.
Symmetry	Asymmetrical or symmetrical; radial or bilateral.
Germinal layers	Diploblastic or triploblastic.
Coelom	Acoelomate, pseudocoelomate or coelomate.
Metamerism	Repeated external/internal segments.
Notochord	Mesodermally derived supporting rod on dorsal side during embryonic development.