FISH: Breathe with gills, Live in water all the time, Oil in liver heps then float, “Swim bladder.”, , , Body cover by soft scales, Lateral line, AMFIBIANS: Live in water part of the time, can breath through their skin, Egg need to be laid in water, Thin skin, , , Name meaning double life, REPTILES: Egg laid on land, Eggs have a shell, Need to be warm to be active, Thick, scaly skin, , , , BIRD: Hollow bones, Feathers, Wings, The body temperature doesn´t depend on outside temperature, , , , MAMMALS: Makes milk, As general rule never lays eggs., Hair or fun, Body temperature doesn´t depend on outside temperature, , , , Have teeth,

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