generate questions: Domestic dogs have been selectively bred for millennia for various behaviors, sensory capabilities, and physical attributes. Modern dog breeds show more variation in size, appearance, and behavior than any other domestic animal. Dogs are predators and scavengers, and like many other predatory mammals, the dog has powerful muscles, fused wrist bones, a cardiovascular system that supports both sprinting and endurance, and teeth for catching and tearing.
What species shows more difference in size, looks and actions than any other? {sep_token} What are dog teeth best suited for? {sep_token} Dogs are considered to be predators and what else? {sep_token} What bones in dog legs are fused? {sep_token} A dog's heart and vascular ability if best suited for sprinting and what else? {sep_token} What are a dog's teeth mainly used for? {sep_token} Dogs originated as predators and what?