The data in the table is given as:

	Sponges	Cnidarians	Arthropods	Roundworms	Flatworms	Annelids	Mollusks	Echinoderms	Chordates
Levels of Organization	Specialized Cells	Specialized Cells, tissues	Specialized Cells, tissues, organs	Specialized Cells, tissues, organs	Specialized Cells, tissues, organs	Specialized Cells, tissues, organs	Specialized Cells, tissues, organs	Specialized Cells, tissues, organs	Specialized Cells, tissues, organs
Body Symmetry	Absent	Radial	Bilateral	Bilateral	Bilateral	Bilateral	Bilateral	Radial (as adults)	Bilateral
Germ Layer	Absent	Two	Three	Three	Three	Three	Three	Three	Three
Body Cavity		Acoelom	True coelom	Pseudocoelom	Acoelom	True coelom	True coelom	True coelom	True coelom
Embryological Development			Protostome	Protostome	Protostome	Protostome	Protostome	Deuterostome	Deuterostome
Segmentation	Absent	Absent	Present	Absent	Absent	Present	Absent	Absent	Present
Cephalization	Absent	Absent	Present	Present	Present	Present	Present	Absent (as adults)	Present