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Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, Echinodermata, Protochordata and Vertebrata Vertebrata - Pisces, Amphibia, Reptilia, Aves and Mammalia
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
What are the differences between animals belonging to the Aves group and those in the mammalia group?