Compléter Definiciones mamíferos, avesVersion en ligne Repasa las principales características de las familias de los mamíferos y las aves. par Teacher Tere Maristas 1 viviparous eggs beak legs two feathers backbone oviparous wings fur vertebrates Mammals are so they born from their mother´s womb . They have backbone so they are . Most of them have four and they move on land . They have they body cover of hair and . Birds are so they lay . They have so they are vertebrates . They have two with and also legs . They use their to eat .
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