pls summarize this
ty
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pls summarize thisty
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Vertebrates, animals with backbones can either be warm or cold-blooded. Classified into five groups, namely: the fish, birds, mammals, reptiles, and amphibians. Fishes are characterized by their scales, fins, and gills. Birds that are covered with feathers. Mammals have mammary glands that allow them to produce milk for their offsprings. Amphibians live both in land and water. Reptiles are covered with hard scales.