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gli animali, invertebrati si suddividono in poriferi,celenterati, "vermi",molluschi, artropodi e echinodermi, gli animali si distinguono invertebrati, vertebrati ???? animali con la colonna vertebrale, vertebrati si suddividono in pesci, anfibi, mammiferi,uccell e rettili, invertebrati ???? animali senza colonnna vertebrale, gli animali si distinguono vertebrati
