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Reptiles and Amphibians are cold-blooded, vertebrate animals that make up two distinct classes within the phylum Chordata. Reptiles, including snakes, lizards, turtles, and crocodiles, are characterized by their scaly skin and ability to lay eggs on land. Amphibians, such as frogs, toads, salamanders, and newts, have moist, glandular skin and undergo a distinct metamorphosis from aquatic larvae to terrestrial adults. Both reptiles and amphibians play crucial roles in their respective ecosystems, serving as both predators and prey for various other organisms. They can be found in diverse habitats around the world, ranging from tropical rainforests to arid deserts and from freshwater streams to marine environments.