Invertebrates, Do not have a backbone, Vertebrates, Have a backbone, Mammals, Have hair, give birth to live young, produce milk, Fish, Have gills, are adapted to life under water, Animals, Complex, multi-cellular organisms that are unable to produce their own food and must obtain it from other organisms., Plants, Complex, multi-cellular organisms that produce their own food by photosynthesis, Reptiles, Have dry scales, are cold-blooded, lay leathery-shelled eggs, Amphibians, Have moist skin, are cold blooded, spend the first part of their life under water and the later part on land, Birds, Have feathers, lay hard-shelled eggs

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