A phylogenetic tree showing the relationships among ten phyla of bilaterian animals is shown below.

A phylogenetic tree showing the relationships amon

Answer

Coelom is the bodycavity derived from the mesoderm. Acoelomates are organisms having no coelom and body cavity is filled by cells. Pseudocoelomates are organisms having the beggining of coelom but the peritoneum is absent. Coelomates are organisms in which true body cavity encloses all organs with peritoneum.

Lophohecheza Eadysazoa Deucherectoraia

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