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Reptiles and amphibians are cold-blooded vertebrates that are known for their diverse appearances and habitats. Reptiles are characterized by their scaly skin, lungs for breathing air, and laying eggs on land. Amphibians, on the other hand, typically have moist skin, lay eggs in water, and undergo metamorphosis from aquatic larvae to terrestrial adults. Both groups play important roles in ecosystems and exhibit a wide range of adaptations for survival in various environments.