All living things are classified into ..... main groups, 1, 2, 4, 5, The 2 main groups of animals are ....., birds - fish, vertebrates - invertebrates, mammals, reptiles - amphibians, Vertebrates have ..... inside their, wings, a backbone, Mammals are, viviparous, oviparous, Mammals breathe using their, skin, lungs, gills, Mammals have hair on their bodies, true, false, Mammals nurse their young with, cereals, milk, water, Birds are ..., Viviparous, Oviparous, Birds have feathers, a beak, and wings, true, false, Fish lay eggs, so they are..., oviparous, viviparous, fish breathe with, lungs, gills, Most reptiles are ...... They lay their eggs on land, oviparous, viviparous, Reptiles have, dry scales, moist scales, Amphibians means, double life, little animals, Amphibians breathe first with gills and then with lungs, true, False, Amphibians have, moist skin, dry skin

VERTEBRATES classification

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