Their water vascular system with tube feet is unique. Sea lilies (Crinoids) may be closest to the ancestral echinoderm. Other groups are modified… | Cheap Nursing Papers

Their water vascular system with tube feet is unique. Sea lilies (Crinoids) may be closest to the ancestral echinoderm. Other groups are modified…

Their water vascular system with tube feet is unique. Sea lilies (Crinoids) may be closest to the ancestral echinoderm. Other groups are modified from this. Chordates -An interesting sidelight: Which side is up?

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