Mammals are warm-blooded vertebrates that have fur or hair, make milk, and give birth to live young, in which the growing embryo is fed by the mother's body. Reptiles are cold-blooded vertebrates that reproduce through eggs and have dry, scaly

skin. They do not have fur and do not produce milk. While both mammals and reptiles are vertebrates, there are significant differences in their physical characteristics and behaviors. Mammals are typically more advanced in terms of brain development and social behavior, while reptiles have specialized adaptations for survival in their environments, such as the ability to change color for camouflage or detach their tail as a defense mechanism.